The nonclassicality of photon-added coherent fields in the thermal channel is investigated by exploring the volume of the negative part of the Wigner function which reduces with the dissipative time. The Wigner functions become positive when the decay time exceeds a threshold value. For the case of the single photon-added coherent state, we derive the exact threshold values of decay time in the...

This paper presents the effects of electron–positron pair production on the linear growth of the resistive hose instability of a filamentary beam that could lead to snakelike distortion. For both the rectangular radial density profile and the diffuse profile reflecting the Bennett-type equilibrium for a self-collimating flow, the modified eigenvalue equations are derived from a Vlasov–Maxwell e...

Radon (222Rn) is a naturally occurring radioactive gas that originates from the decay of radium (226Ra) in the primordial uranium (238U) decay series. As a noble gas, it easily migrates through inter-granular spaces; then, because of advection, diffusion and convection with other gasses or with water, it moves through fi ssures and faults until it reaches the outdoor atmosphere. Its half-life i...

After seventy years of controversial discussion, the reports by Dean et al. that purported to demonstrate an inverse relationship between the prevalence of tooth decay in children and the fluoride content of drinking water are still cited as strong evidence for a significant anti-caries effect of fluoride, despite their many shortcomings. In addition, major hypotheses for possible cariostatic m...

After seventy years of controversial discussion, the reports by Dean et al. that purported to demonstrate an inverse relationship between the prevalence of tooth decay in children and the fluoride content of drinking water are still cited as strong evidence for a significant anti-caries effect of fluoride, despite their many shortcomings. In addition, major hypotheses for possible cariostatic m...

PURPOSE Age-related macular degeneration (AMD) is the leading cause of irreversible visual impairment among older adults. This study explored the relationship between AMD, fall risk, and other injuries and identified visual risk factors for these adverse events. METHODS Participants included 76 community-dwelling individuals with a range of severity of AMD (mean age, 77.0 ± 6.9 years). Baseli...

BACKGROUND/OBJECTIVES Older adults with dementia have at least a twofold increased risk of falls. Multi-factorial interventions have failed to demonstrate a reduction in falls in this group. Improved understanding of specific cognitive factors and their relationship to gait, balance and falls is required. METHODS Systematic searches of Medline, Embase, PsycInfo, and CINAHL databases from ince...

Falls are common in the elderly, and potentially result in injury and disability. Thus, preventing falls as soon as possible in older adults is a public health priority, yet there is no specific marker that is predictive of the first fall onset. We hypothesized that gait features should be the most relevant variables for predicting the first fall. Clinical baseline characteristics (e.g., gender...

INTRODUCTION There is a consistent body of evidence supporting the role of cognitive functions, particularly executive function, in the elderly and in neurological conditions which become more frequent with ageing. The aim of our study was to assess the role of different domains of cognitive functions to predict balance and fall risk in a sample of adults with various neurological conditions in...