229 research outputs found
Risks and management of pregnancy in women with epilepsy: a review
Women with epilepsy (WWE) face certain challenges during their pregnancy. In the present article an effort has been made to review the information regarding the frequency of seizure in pregnancy, effects of epileptic seizure on fetus, complications during pregnancy and delivery, incidences of fetal congenital malformations and infant development. The article reviews these concerns with special emphasis on management of pregnancy. Recommendations concerning prenatal counselling, anti-epileptic drug management, breast feeding and contraception are also taken up in the later part of the article
Autofocusing and self-healing of partially blocked circular Airy derivative beams
We numerically and experimentally study the autofocusing and self-healing of
partially blocked circular Airy derivative beams (CADBs). The CADB consists of
multiple rings, and partial blocking of CADB with different kinds is achieved
by using symmetric and asymmetric binary amplitude masks, enabling blocking of
inner/outer rings and sectorially. The CADB blocked with different types
possesses the ability to autofocus, however, the required propagation distance
for abrupt autofocusing vary with the amount and types of blocking. The abrupt
autofocusing is quantified by a maximum k-value, and how fast it changes around
the autofocusing distance (). In particular, CADB blocked with inner
rings (first/two/three) exhibits an abrupt autofocusing, as the k-value sharply
increases [decreases] just before [after] . The maximum k-value always
occurs at , which decreases as the number of blocked inner rings
increases. For CADB blocked with outer rings, the k-value gradually changes
around , indicating a lack of abrupt autofocusing. The value of
increases with the number of blocked outer rings. This suggests that
although outer rings contain low intensities, these play an important role in
autofocusing. A sectorially blocked CADB possesses an abrupt autofocusing, and
maximum k-value depends on the amount of blocking. The CADB blocked with
different types possesses good self-healing abilities, where blocked parts
reappear as a result of redistribution of intensity. The maximum self-healing
occurs at , where an overlap integral approaches a maximum value.
Finally, we have compared ideal CADB and partially blocked CADB having the same
radii, and found that an ideal CADB possesses better abrupt autofocusing. We
have found a good agreement between the numerical simulations and experimental
results.Comment: 16 pages, 20 figure
Biodegradation of Melanoidin from Distillery Effluent: Role of Microbes and Their Potential Enzymes
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