By now there is substantial evidence that Gamma-Ray Bursts (GRBs) originate at cosmological distances from very powerful explosions. The interaction between a GRB and its surrounding environment has dramatic consequences on the environment itself. At early times, the strong X-ray UV afterglow flux photoionizes the medium on distance scales on the order of 100 pc [7], destroys dust [10], creates...

Determination of antibody avidity measurements can be difficult in human serum depending on the population evaluated. We evaluated three approaches for the determination of antibody avidity for immunoglobulin G (IgG). These approaches were (i) elution of bound antibody with increasing concentrations of a chaotropic agent using a single serum dilution, (ii) binding interference of multiple serum...

Introduction Measurement of serum digoxin concentrations before steady-state is reached results in a falsely low concentration, and may affect treatment safety. We evaluated the proportion of serum digoxin measurements performed before steady-state is reached and the reasons for inappropriate sampling in hospitalized patients. Materials and methods Electronic medical records of patients hospi...

Besides being a distribution medium for up-to-date information, the Internet provides professional communities of users with an infrastructure for collaborative work. An important problem, however, is that groups working over the Internet often fail to accomplish their goals. In this paper our focus is on one category of professional communities, namely research networks. These are networks of ...

A threshold concept is defined by Meyer and Land (2003) as possessing the following qualities: transformative, integrative, bounded, and probably irreversible. This concept provides a promising way of interpreting the learning demand presented by subjects and Meyer and Land have begun to apply the idea in analysing learning economics. It redefines the familiar idea of a ‘powerful concept’ in a ...

The popularity of the Android System in combination with the lax market approval process may attract the injection of malicious applications (apps) into the market. Android features a permission system allowing a user to review the permissions an app requests and grant or deny access to resources prior to installation. This system conveys a level of trust due to the fact that an app only has ac...

A survey of Extension Wildlife Specialists in the U.S. provided a basis for estimating the magnitude of urban wildlife damage and control in this country. Response to the 9-question mail questionnaire was good (76 percent) following the single mailing to all Extension Wildlife Specialists or people in similar positions listed in the national directory. The majority of questions were answered ba...