After major incidents and disasters psychosocial support for the people affected is urgent and sometimes predominant. To plan and train staff for psychosocial intervention European and national guidelines have been developed. The European Policy Paper "Psychosocial support in situations of mass emergencies" offers guidance for policy-makers and health-planners. The quality and time of early psy...

the aims of this study were to investigate the effect of photoperiod and light intensity on egg production and hatching rate in acartia clausi in laboratory conditions. this zooplankton was collected from caspian coastal waters of mazandaran province by the use of a 100µ net. all tests were performed in five light treatments (photoperiod) namely 24:00, 18:06, 12:12, 06:18, 00:24 (light / dark),...

natural light is one kind of light which its main resources are sun and starts. philosophers and researchers believe that spiritual and holy light not only includes material and quantified aspect, but also because of its non-physical properties always treats as a spiritual connector between god and man. light is the main part of existing which not only contacts to the surface of objects, but it...

Dispersion of light waves is well known, but the subject deserves some comments. Certain classical equations do not fully respect causality; as an example, group velocity v g usually given first derivative angular frequency ? with to spatial k m (or wavenumber) in medium, whereas it that depends on . This paper also emphasizes use phase index n and , inverse their respective velocities, normali...

UNESCO (the United Nations Educational, Scientific, and Cultural Organization) has declared 2015 the "International Year of Light and Light-Based Technologies". In celebration of this proclamation, this Outlook provides a general history of light and its applications, from the earliest moments of the Big Bang through its present impact on all forms of life on the planet. Special emphasis is pla...

Background: Due to rapid advances in modern technologies such as telecommunication technology, the world has witnessed an exponential growth in the use of digital handheld devices (e.g. smartphones and tablets). This drastic growth has resulted in increased global concerns about the safety of these devices. Smartphones, tablets, laptops, and other digital screens emit high levels of short-wav...