Capacitance calculation of cylindrical and spherical capacitors using Gauss's law

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In this video, capacitance calculation of cylindrical and spherical capacitance using Gauss's law and potential formula is discussed.










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Design equations of Rectangular Microstrip Patch Antenna

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What is ORS? Oral re-hydration salts: It is a glucose-electrolyte formula given by WHO/UNICEF, used for correction of acute diarrhea due to all causes and dehydration in all age groups with aim to reduce mortality. It is available in powder form in sachets/ ready-made solution or it can be easily made at home. How it works? The combination of electrolytes and sugar together stimulates water and electrolyte absorption from the gut and hence  capable of correcting water and electrolyte deficit in conditions such as diarrhea and vomiting. Reasons to celebrate ORS day? ORS Day is celebrated every year on 29th July:  To spread awareness about the importance of Oral Rehydration Salts (ORS) as a low cost method of health intervention.   Among infants and young children, acute diarrhoeal diseases are one of the leading causes of mortality in many developing countries.   Dehydration particularly affects infants, children and old people.  Diarrhea normally lasts for several days, and leaves the
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The integrated approach of mosquito control: This is an approach that avoids the excessive use of any one method (e.g insecticides) but tries to combine one or more methods with a view to obtain maximum results with minimum inputs and also to prevent environmental pollution with toxic chemicals & development of insecticide resistance. The various methods of mosquito control are as follows: 1. Anti- Larval Measures: (a) Environmental Control: Important Points: Source reduction : Mainly the elimination of mosquito breeding places by minor engineering methods such as  Filling- of cesspools & open ditches and arrangement for adequate collection, removal, and disposal of sewage & wastewater. Leveling & getting rid of water-holding containers such as discarded tins, empty pots, broken bottles, coconut shells, etc. Drainage of breeding places, and  Water management (e.g intermittent irrigation) & removal of aquatic plants or destruction by herbicides. Rendering the water u
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  First generation IUDs: Comprise the inert or non-medicated devices, usually made of polyethylene or other polymers. Appeared in different shapes and sizes. 1. Grafenberg rings: Important points: A flexible ring of silk Later versions were wrapped in silver wire Introduced by German gynecologist Ernst Grafenberg in 1929 Creates a hostile environment for sperm due to inflammatory response Obsolete     2. Ota ring: Important points: It is a variation of Grafenberg ring Developed by Japanese physician Tenrej Ota It contained a supportive structure in the center to lower the expulsion rate Obsolete 3.  Birnberg’s bow: Important points: Figure of 8 shaped Made of polyethylene Obsolete 4. Lippes Loop: Important points: A double-S shaped device made of polyethylene Polyethylene is a non-toxic, non-tissue reactive & extremely durable Contains a small amount of barium sulfate to allow X-ray observation It has attached threads /tail (nylon) which project into vagina after insertion & ma
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Spotters in "Environment and Health: Mosquitoes- Culex" for CFM & MPH students

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Culex Mosquito: Also known as "nuisance mosquitoes". Culex fatigans is a vector of Bancroftian filariasis in India. It breeds profusely in dirty water collections e.g. stagnant drains, cesspools, septic tanks, burrow pits, & in fact all types of water collections. 1. Eggs: Important points: Lays eggs in small clusters or rafts.  Each raft contains 100-250 eggs. Eggs are oval-shaped. The eggs do not possess lateral floats. 2. Larva: Important points: Suspended in water with their heads downwards.  Possess a siphon tube, situated on the 8th abdominal segment.  Bottomfeeder. No palmate hairs. This stage lasts for 5-7 days. 3. Pupa: Important points: Comma shaped in appearance, with a large rounded cephalothorax & a narrow abdomen. The Siphon tube is long & narrow.  It represents the resting stage.  4. Adult:  Important points: A strong winged mosquito & can fly up to 11 km in rural areas.  Highly anthrophillic.  When at rest, the body exhibits a hunch back &
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