56 research outputs found
Die mĂ€rkische Dorfkirche : Vortrag auf der 10. Hauptversammlung des Deutschen Vereins fĂŒr lĂ€ndliche Wohlfahrts- und Heimatpflege am 13. Februar 1906
Spectral method for matching exterior and interior elliptic problems
A spectral method is described for solving coupled elliptic problems on an
interior and an exterior domain. The method is formulated and tested on the
two-dimensional interior Poisson and exterior Laplace problems, whose solutions
and their normal derivatives are required to be continuous across the
interface. A complete basis of homogeneous solutions for the interior and
exterior regions, corresponding to all possible Dirichlet boundary values at
the interface, are calculated in a preprocessing step. This basis is used to
construct the influence matrix which serves to transform the coupled boundary
conditions into conditions on the interior problem. Chebyshev approximations
are used to represent both the interior solutions and the boundary values. A
standard Chebyshev spectral method is used to calculate the interior solutions.
The exterior harmonic solutions are calculated as the convolution of the
free-space Green's function with a surface density; this surface density is
itself the solution to an integral equation which has an analytic solution when
the boundary values are given as a Chebyshev expansion. Properties of Chebyshev
approximations insure that the basis of exterior harmonic functions represents
the external near-boundary solutions uniformly. The method is tested by
calculating the electrostatic potential resulting from charge distributions in
a rectangle. The resulting influence matrix is well-conditioned and solutions
converge exponentially as the resolution is increased. The generalization of
this approach to three-dimensional problems is discussed, in particular the
magnetohydrodynamic equations in a finite cylindrical domain surrounded by a
vacuum
Technology Interventions to Curb Obesity: A Systematic Review of the Current Literature
Abstract Obesity is a public health crisis that has reached epidemic proportions. Although intensive behavioral interventions can produce clinically significant weight loss, their cost to implement, coupled with resource limitations, pose significant barriers to scalability. To overcome these challenges, researchers have made attempts to shift intervention content to the Internet and other mobile devices. This article systematically reviews the recent literature examining technology-supported interventions for weight loss and maintenance among overweight and obese adults. Thirteen studies were identified that satisfied our inclusion criteria (12 weight loss trials, 1 weight maintenance trial). Our findings suggest that technology interventions may be efficacious at producing weight loss. However, several studies are limited by methodologic shortcomings. There are insufficient data to evaluate their efficacy for weight maintenance. Further research is needed that employs state-ofthe-art methodology, with careful attention being paid to adherence and fidelity to intervention protocols
London creditors and the fifteenth-century depression
Evidence of debts owed to Londoners, and contested before the royal Court of Common Pleas, allows an examination of the role of London creditors in the English depression of the fifteenth century and a reassessment of its causes. Here we examine four main issues. What is the nature of the Court of Common Pleas evidence (section I)? What were the three main forms of credit offered by Londoners âunsecured cash loans, sales of goods on credit, and written instruments called bonds (section II)? What is yielded by decadal analysis of Londonersâ extension of credit in the fifteenth century âmaking direct comparisons with Pamela Nightingaleâs published Statute Merchant and Staple data (section III)? What defines, in modern economic terms, the claim of so called âmonetaristâ historians that credit was actively withdrawn during the depression, and how is this verified by the actions of London creditors (section IV)? It is concluded that the records of the Court of Common Pleas provide the detailed evidence monetarist historians have previously lacked both to prove that Londoners actively withdrew credit during the fifteenth century and to demonstrate that they employed pure equilibrium credit rationing in order to do so
Behavioral health coaching for rural veterans with diabetes and depression: a patient randomized effectiveness implementation trial
Online Tools for Evidence-Based Behavioral Practice: A Mixed-Methods Evaluation Among Graduate Students and Clinicians
HomosexuellenunterdrĂŒckung in der bĂŒrgerlichen Gesellschaft
HomosexuellenunterdrĂŒckung in der bĂŒrgerlichen Gesellschaf
Siedeapparat (Hypsometer)
Der Ankauf erfolgte 1899 von der Firma Fuess in Steglitz. Es handelt sich um ein
transportables GerĂ€t, bestehend aus Dreibein, WassergefĂ€Ă, Spiritusbrenner und
Thermometer. Es diente dazu, SiedepunktÀnderungen von Wasser zu messen und daraus den
Luftdruck bzw. die Meereshöhe zu bestimmen. (K.R./P.G. 2011), UM HP 2
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