Pathya Apathya and role of Dinacharya in Nethra Swasthya

The word Chakshu means, that which illuminates the objects and enlightens the mind about its details. It is seated in the two eye balls. When we talk about Pathya and Apathya, the importance of the word Chakshushya is impressed upon. The Pathyas have been explained by different authors in the heading of Chakshushya Vargas and the Apathyas have been explained as Achakshushya. Different Acharyas have also explained about the various daily regimen to be followed for maintaining Nethra Swasthya as Ayurveda gives much importance in maintaining of health and prevention of diseases along with the treatment of diseases. These Dinacharyas can be adopted in our day to day lives to protect the eye from diseases and improve the vision, by implementing improvised techniques tailor-made for day to day activities of present era. The Acharyas have armed us with proper knowledge to prevent and treat life style disorders related to eye diseases through explanation of Pathya Apathya and Dinacharyas which are practices of Kriyakalpas. Most of these practices are not being followed these days which leads to many Nethra Rogas. This can be corrected by reimplementing improvised versions of such practices in our daily life

Sustained effects of corrupted feedback on perceptual inference

Abstract Feedback is central to most forms of learning, and its reliability is therefore critical. Here, we investigated the effects of corrupted, and hence unreliable, feedback on perceptual inference. Within the framework of Bayesian inference, we hypothesised that corrupting feedback in a demanding perceptual task would compromise sensory information processing and bias inference towards prior information if available. These hypotheses were examined by a simulation and in two behavioural experiments with visual detection (experiment 1) and discrimination (experiment 2) tasks. Both experiments consisted of two sessions comprising intervention runs with either corrupted or uncorrupted (correct) feedback, and pre- and post-intervention tests to assess the effects of feedback. In the tests alone, additional prior beliefs were induced through predictive auditory cues to assess sustained effects of feedback on the balance between sensory evidence and prior beliefs. Both experiments and the simulation showed the hypothesised decrease in performance and increased reliance on prior beliefs after corrupted but not uncorrupted feedback. Exploratory analyses indicated reduced confidence regarding perceptual decisions during delivery of corrupted feedback. Our results suggest that corrupted feedback on perceptual decisions leads to sustained changes in perceptual inference, characterised by a shift from sensory likelihood to prior beliefs when those are accessible

First observations of the midlatitude evening anomaly using Super Dual Auroral Radar Network (SuperDARN) radars

[1] Under geomagnetically quiet conditions, the daytime midlatitude ionosphere is mainly influenced by solar radiation: typically, electron densities in the ionosphere peak around solar noon. Previous observations from the Millstone Hill incoherent scatter radar (ISR) have evidenced the presence of evening electron densities higher than daytime densities during the summer. The recent development of midlatitude Super Dual Auroral Radar Network (SuperDARN) radars over North America and Japan has revealed an evening enhancement in ground backscatter during the summer. SuperDARN observations are compared to data from the Millstone Hill ISR, confirming a direct relation between the observed evening enhancements in electron densities and ground backscatter. Statistics over a year of data from the Blackstone radar show that the enhancement occurs during sunset for a few hours from April to September. The evening enhancement observed by both SuperDARN and the Millstone Hill ISR is shown to be related to recent satellite observations reporting an enhancement in electron densities over a wide range of longitudes in the Northern Hemisphere midlatitude sector during summer time. Finally, global results from the International Reference Ionosphere (IRI) and the horizontal wind model (HWM07) are presented in relation with previously published experimental results and proposed mechanisms of the evening enhancement, namely, thermospheric horizontal winds and geomagnetic field configuration. It is shown that the IRI captures the features of the evening enhancement as observed by SuperDARN radars and satellites