Effect of Thermal Undulations on the Bending Elasticity and Spontaneous Curvature of Fluid Membranes

We amplify previous arguments why mean curvature should be used as measure of integration in calculating the effective bending rigidity of fluid membranes subjected to a weak background curvature. The stiffening of the membrane by its fluctuations, recently derived for spherical shapes, is recovered for cylindrical curvature. Employing curvilinear coordinates, we then discuss stiffening for arbitrary shapes, confirm that the elastic modulus of Gaussian curvature is not renormalized in the presence of fluctuations, and show for the first time that any spontaneous curvature also remains unchanged.Comment: 26 pages, 2 figures, to appear in EPJ

A Capacity Supply Model for Virtualized Servers

This paper deals with determining the capacity supply for virtualized servers. First, a server is modeled as a queue based on a Markov chain. Then, the effect of server virtualization on the capacity supply will be analyzed with the distribution function of the server load.Markov chain, Weibull distribution, server, capacity supply

Interacting Crumpled Manifolds: Exact Results to all Orders of Perturbation Theory

In this letter, we report progress on the field theory of polymerized tethered membranes. For the toy-model of a manifold repelled by a single point, we are able to sum the perturbation expansion in the strength g of the interaction exactly in the limit of internal dimension D -> 2. This exact solution is the starting point for an expansion in 2-D, which aims at connecting to the well studied case of polymers (D=1). We here give results to order (2-D)^4, where again all orders in g are resummed. This is a first step towards a more complete solution of the self-avoiding manifold problem, which might also prove valuable for polymers.Comment: 8 page

Livro Digital Comemorativo aos 70 anos do ICBNA: as novas tecnologias preservando a história da inserção cultural estadunidense em Porto Alegre

Este artigo apresenta o processo criacional do livro digital comemorativo aos 70 anos do Instituto Cultural Brasileiro Norte-Americano - ICBNA. O texto atenta para a diversidade de fontes da instituição e como as mesmas foram adaptadas a “era digital”, buscando contribuir com a historiografia acerca do tema, revelando não apenas como se deu o processo de inserção cultural estadunidense na capital, mas também como a cultura e as novas tecnologias podem andar lado a lado na construção do conhecimento histórico e na preservação do patrimônio cultural.Sem bols

Getting access to the self: Effects of self-management therapy on the development of self-regulation and inhibitory control in obese adolescents

Background and aims: This study investigated the role of self-regulation competencies in general and specifically in a food-related context for the control of body weight in a three-year weight loss program. Methods: The sample consisted of 30 male and female adolescents (age range: 11–18 years) who participated in a three-year therapy program for severe obesity (mean BMI at the beginning of the intervention was 33.6). Assessment of self-regulation competencies was conducted at three different stages (1st–3rd graduation/class year). Therefore, three independent groups of adolescents (N = 10) at these different stages were tested (initial-to final-stage of therapy). At the time of testing the BMI of these groups significantly differed from 38.8 to 28.7. Analyses of covariance were performed to determine whether the adolescents also differed in self-regulation skills like “resistance to temptation” and food-related Stroop interference along with ameliorating their energy-balance regulation. Results: In addition to the main effects of age and body mass index, adolescents further displayed significant improvements of executive functions with respect to resistance to temptation and inhibition. Conclusions: Interventions aimed at enhancing energy-balance regulation in adolescents may further benefit from efforts to facilitate executive functions such as self-regulation and food-related cognitive inhibition

Virtual Case Management: Can a State Agency Realistically Survive Without Paper?

In the fall of 2000 the state of Illinois Department of Human Services, Office of Rehabilitation Services (ORS), introduced its new Virtual Case Management System, (VCM). This exciting new concept in case management greatly reduces paperwork and labor-intensive handling of customer files. VCM streamlines status movements, reduces errors and improves timelines of services. Illinois continues to upgrade its new technology to include time saving features and assure safe, confidential treatment of customer information

A Capacity Supply Model for Virtualized Servers

This paper deals with determining the capacity supply for virtualized servers. First, a server is modeled as a queue based on a Markov chain. Then, the effect of server virtualization on the capacity supply will be analyzed with the distribution function of the server load