It is known that micro-task worker performance fluctuates. While between-worker variability has been studied and has been used to define filters (e.g., to filter out “bad” workers), within-worker variability (i.e. how each worker's performance varies over time) has received less attention. Better understanding of the sources of such variability will result in the design of better filters, and m...

We consider a frictional labor market in which firms want to insure their senior employees against income fluctuations and, at the same time, want to recruit new employees to fill their vacant positions. Firms can commit to a wage schedule, i.e. a schedule that specifies the wage paid by the firm to its employees as function of their tenure and other observables. However, firms cannot commit to...

BACKGROUND Industrial radiography is known to be one of the most vulnerable lines of work among the range of different radiation work. According to the relevant law in Korea, every worker registered in this work should check their blood cell counts every year in addition to their thermoluminescent dosimeter (TLD) doses. Since the law was enacted, however, few follow-up studies have been carried...

The article considers the experience of development public exposure scenarios for land sites with residual radioactive contamination on example three located in Moscow and St. Petersburg. study was intended to identify anticipated groups users select parameters calculating radiation doses. Exposure regarding use living or working were described by such as duration stay, staying indoors outdoors...

Radiation cannot be felt directly by the five human senses. For occupational safety and security, a radiation worker or radiographer is endeavored to receive dose as minimum possible, which monitoring using measuring device. The purpose of this study was analyze effect collimation area irradiation distance on x-ray measurement Geiger Muller. In case, author tried make dosimeter Muller module di...

background influenza is a world-wide public health concern. it is one of the most important viral causes of acute respiratory illness, affecting all age groups, recurring several times during a lifetime. we assessed the antibody titers after vaccination against influenza among hiv-infected patients and health care workers (hcws). patients and methods during this before-after study, the antibody...

Body mass shapes processes from cell metabolism to community dynamics. Little is known, however, about how the average body mass of individuals varies among ecological communities. Ants alter colony mass by independently changing worker mass and/or worker number. In a survey of 49 ecosystems from tundra to tropical rainforest, average worker mass and worker number were uncorrelated (r(s) = 0.2,...

O ver the past several years, many sources of information have emerged regarding the potential risks of low-dose ionizing radiation from medical imaging. Many published educational materials and scientific studies have heightened awareness among patients, the public, and medical professionals. The press has extensively reported on this topic, sometimes omitting nuances regarding the strength of...