Notes and link to the YouTube video on Lumped-element circuit analysis of Transmission Lines
Notes of the Video you tube video on lumped-element equivalent of transmission line
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Spotters in "Family Planning: Barrier Contraceptive Methods" for CFM & MPH students
Physical methods: 1. Male Condom: Important points: It is a thin sheath made up of latex or other material Most widely known & used barrier method by males An effective, simple spacing method without side effects Mechanism of action: Acts as a physical barrier & prevents the semen from being deposited in female genital tract Pearl index/ Failure rate: 2-3 to 14 per 100 women years Advantages: Easily available, safe & inexpensive, easy to use & do not require medical supervision, no side effects, light compact and disposable, provides protection not only against pregnancy but also against STDs Disadvantages: It may tear or slip off during coitus due to incorrect use, interferes with sex sensation locally, Manufactured in India by Hindustan Latex in Trivandrum, London Rubber industries Chennai 2. Female Condom: Important points: It is a pouch made of thin plastic, polyurethane, which lines the vagina Has two rings,a thick inner ring with closed end, which is plac
Design equations of Rectangular Microstrip Patch Antenna
Following design equation can be used to calculate the width and length of rectangular microstrip patch antenna and simulation of 2.4 GHz inset-feed rectangular patch antenna can be found in follwing video. Microstrip antenna with inset-feed line Part-1 Design step for the calculation of W and L Step-1 : To calcualte width 'W' use follwing formula Step-2: Calculate the effective dielectric constant using formula below. Here ' ε r ' is relative dielectric constant of the material. 'h' is height of the substrate and W is the width of patch calculated in first step. Step-3: Calculate ΔL using formula below. Step-4: Calculate length of the patch using formula below. v 0 is speed of light in free space. Part-2 Feedline calculation Step-1: Calculate the input impdedance of the patch using follwing formula. (Typically between 200 Ω to 250 Ω. You can assume 225 Ω for simplic
Spotters in "Hospital Waste Management" for CFM & MPH students
As per “Bio-medical Waste Management Rules, 2016” 1. Yellow Bin/ Bag: Type of Bag/ Container used: Non-chlorinated plastic bags Type of Waste: 1. Human Anatomical Waste A. Tissues, organs, body parts B. Foetus, Umbilical stump, placenta 2. Animal Anatomical Waste: Tissues, Organs, body parts 3. Soiled Waste: items contaminated with blood and body fluids A. Dressings, sponges, gauze B. Plaster casts C. Cotton swabs D. Blood bags E. Infected gowns, mask, shoe covers, cap 4. Expired or Discarded Medicines: including antibiotics (except cytotoxic) 5. Chemical Waste: A. Discarded disinfectants, Cleaning agents B. X-ray film developing liquid, Infected secretions C. Aspirated body fluids, Liquid from laboratories 6. Microbiology, Biotechnology, and other clinical lab waste 7. Chemical Liquid Waste Yellow bin/ bag with the cytotoxic label: 1. Used, discarded, and expired cytotoxic drugs whether in plastic vaccutainers, syringes, glass vials, ampoules, glass bottles. The containe
Boundary condition for conductor-free space boundary in terms of Tangential and Normal components
In this video, Boundary condition are derived for conductor-free space boundary in terms of Tangential and Normal components
Spotters in "Environment and Health: Water" for CFM & MPH students
1. Sanitary well: Important points: Location: Not less than 15 m (50 feet) from likely sources of contamination & at a higher elevation. Not more than 100 m from houses Lining: Should be made up of bricks/ stones & cement up to a depth of at least 6 m (20 feet) and 60-90 cm (2-3 feet) above the ground Parapet wall: up to a height of 70-75 cm (28 inches) above the ground Platform: Extending at least 1m (3 feet) in all directions with a gentle slope towards the drain. Drain: pucca drain around the well to carry off spilled water to a public drain or soakage pit. Covering: Top closed by a cement cover. Hand pump: If possible it should be equipped with a hand pump in a Sanitary manner. 2. Slow sand filter: Important points: Space: Occupies a large area Rate of filtration: 2-3 m.g.a.d The effective size of sand: 0.2-0.3 mm Preliminary treatment: Plane sedimentation. Washing: By scraping the sand bed Operation: Less skilled Loss of head allowed: 4 feet (1.5 m) Removal
Spotters in "Environment and Health: Insecticides" for CFM & MPH students
Insecticides: These are substances that are used to kill insects. Pesticides: It is a general term that includes insecticides, fungicides rodenticides, herbicides, disinfectants, repellents, and other chemicals used for the control of pests. Insecticides are classified into 3 groups: Contact poisons, Stomach poisons and Fumigants. CONTACT POISONS: These are those insecticides that kill insects primarily by contact e.g., pyrethrum, DDT, HCH, dieldrin. STOMACH POISONS: These are those insecticides which when ingested cause the death of the insects, e.g., Paris green, sodium fluoride. FUMIGANTS: These are those insecticides that give off vapours that have a lethal effect on the insects, e.g., sulphur dioxide. 1. DDT (Dichloro-diphenyl-trichloroethane) : It was first synthesized in 1874, by a German chemist, Ziedler . I ts insecticidal properties were discovered by the Swiss scientist, Paul Muller in 1939 . Important points: PROPERTIES: It is a white amorphous
Spotters in "Environment and Health: Mosquito control Measures" for CFM & MPH students
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
Two port power gain and its calculation
In this blog, two port power gain for microwave amplifier has been discussed and formula for different type of power gain is derived. The YouTube video and notes are attached.
Spotters in "Environment and Health: Sanitation" for CFM & MPH students
1. Sanitation Barrier: Important points: Disease agents transmitted to a new host through various channels: 1. water/ fluids , 2. fingers , 3. flies , 4. soil , and 5. food The disease cycle may be broken at various levels: 1. protection of water , 2. personal hygiene , 3. control of flies , 4. segregation of faeces , and 5. protection of foods The most effective step would be to segregate the faeces & arrange for proper disposal so that the disease agent cannot reach the new host, directly or indirectly. The segregation of the excreta by imposing a barrier called the " sanitation barrier " which can be provided by a 'sanitary latrine' and disposal pit. 2. Borehole latrine: Important points: It was first introduced by the Rockefeller foundation during 1930s in campaigns of hookworm control. It consists of a circular hole of 30-40 cm (12-16 in.) in diameter. Dug vertically into the ground to a depth of 4 to 8 m (13-26 ft.), most commonly 6 m (20 ft.). Auger
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