it is estimated that one third of the world's population is latently infected with tuberculosis (tb). the hiv epidemic fuels the tb epidemic by increasing the risk of reactivation of latent tb infection and by facilitating a more rapid progression of tb disease. although the incidence of tb is constant or decreasing in many regions of the world, rates remain high in developing countries as a co...

demographic changes in germany show the fastest progress of all european countries and are not only influencing socioeconomic issues but also the management of patients with their individual risc profile. especially severely injured elderly constitute a group of patients who need specific attention due to their individual age related pathophysiological processes. 21% of the german population we...

purpose: to determine the incidence, concurrent factors and clinical results of re-operation after corneal refractive surgeries. methods: in this retrospective descriptive study records of all patients undergoing corneal refractive surgeries including prk, lasik, and lasek between april 2005 and december 2006 were assessed. patients who had undergone re-operations entered the study; visual acui...

this article was aimed to provide an overview and a perspective on the changing impact of cancers with increasing age on three age groups. a population based cancer registry was undertaken to register all new cancers cases from march 2006 to march 2007. during one year, 2023 (41.1%) of 4922 patients with cancer were ≥65 years. the five most common cancers (excluding skin cancer) were stomach, b...

Direct or Eley-Rideal reactions between energetic N^{+} and O^{+} projectiles and O atoms, adsorbed onto Pt and Pd surfaces, are studied experimentally at incidence energies between 20 and 200 eV. The exit energies of the diatomic molecular products NO and O_{2} depend linearly on the incidence energy of the corresponding projectiles. A reaction mechanism is proposed, where the incident project...

Despite the recent and rapid expansion of supermarkets in developing countries, their association with diet quality has been hardly studied. The study took place in Tunisia, where incidences of obesity and nutrition-related diseases are rising. The target population was households of the Greater Tunis area where supermarkets are mostly located. Households (n = 724) were selected by a 2-stage cl...

Background Malnutrition is part of a vicious cycle involving underlying factors related to biological and social aspects (WHO 1995). Some factors—known as proximal factors—are directly associated with malnutrition, such as inadequate dietary intake and incidences of disease, while others are more distant but no less important. These are socio-economic in nature and are associated with children’...

Article history: Received 7 February 2013 Accepted 15 October 2013 Available online 4 November 2013 Submitted by S. Kirkland

We present exact results for the delta peak at zero energy in the spectral density of the random graph incidence matrix model as a function of the average connectivity. We give an analytic expression for the height of this peak, and a detailed description of the localized eigenvectors. Their total contribution to the peak is given. This allows to study analytically a delocalization and a reloca...

Recent study has shown that the energy gain of a solar panel will be significantly influenced by the incidence angle of the sun radiation. The main goal of this paper is to present a sensor-based sun-tracking system. First, we design a sensing tower for measuring the direction of sun radiation. Then we design a sun-tracking algorithm, which adopts an iterative process to identify the direction ...