detected by a photo diode sensor. The changing blood volume with heartbeat results in a train of pulses at the output of the photo diode‚ the magnitude of which is too small to be detected directly by a microcontroller. Therefore‚ a two-stage high gain‚ active low pass filter is designed using two Operational Amplifiers (OpAmps) to filter and amplify the signal to appropriate voltage level so that the pulses can be counted by a microcontroller. The heart rate is displayed on a 3 digit seven segment display
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Effects of Polio on Society Polio had existed in society for a long time in history‚ although not as big a problem in history as in the 20th century‚ when greater emphasis was put on sanitation and children stopped getting the disease as babies. The effects of this disease on society were great. People feared that tomorrow they or their family members or friends would catch polio. Although polio has been significantly reduced in numbers‚ it still continues to exist in Africa and some parts of
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The Polio Vaccine in America When my daughter was a baby‚ and we decided to delay vaccination‚ a friend of my mother-in-law seemed thrilled with our decision. However‚ she advised to look into the polio vaccine because there wasn ’t much they could do if someone did contract polio. During my research‚ I have found that the polio vaccine is all but completely unnecessary for anyone in the United States. Let ’s take a look at some of the most interesting information I have found. Taken directly
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What is Polio Disease? This viral disease can affect nerves that can lead to serious paralysis (muscle function loss)‚ sometimes partial‚ or even complete. How is Polio Spread (Mode of Transmission)? Polio is a virus that spreads by the following: contact with infected feces‚ direct human-to-human contact‚ and contact with infected mucus or phlegm from the mouth or nose. What are the symptoms? The symptoms of Paralytic Poliomyelitis include: Fever (5-7 days before other symptoms)‚ abnormal
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Polio‚ or more properly poliomyelitis Polio is caused by a virus which results in an acute infection. However‚ contrary to what is commonly believed‚ the virus did not typically result in paralysis. Rather‚ the majority of infected individuals experienced only mild respiratory or gastrointestinal symptoms‚ often accompanied by fever‚ headache‚ and muscle stiffness. These symptoms lasted only a few days‚ and many had such mild cases that they did not even realize they were ill. Therefore‚ they
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THE POLIO VACCINE Amber Metoxen In 1952‚ The Polio epidemic happened‚ each of the 48 states at the time had rampant cases of Polio. The un-curable disease had taken over America. Poliomyelitis is an infectious viral disease that attacks the nerve cells and sometimes the central nervous system; it is caused by the destruction of nerve cells in the spinal cord. Polio often causes muscle wasting‚ paralysis‚ and even death.1 In surveys of what Americans feared most‚ Polio came in second to the
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Kristen Coleman What is Post- Polio Syndrome? Post-polio syndrome (PPS) is an illness that causes symptoms to reappear in individuals who had recovered from polio decades earlier. After recovering from polio‚ some survivors find themselves afflicted again‚ facing a serious condition called post-polio syndrome. PPS is a condition in the nervous system that affects muscles and nerves. What are the symptoms of Post-Polio Syndrome? Symptoms of post-polio tend to show up in a patient gradually
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Lab#: 15 Title: Exercise/pulse rate Aim: To investigate the effect of exercise on the pulse rate Materials/ Apparatus: Stop watch Diagram: Procedure: 1. The three middle fingers were placed just behind the bottom of the wrist as indicated in the diagram in order to see if the pulse could be felt. 2. (a) If the pulse was not felt the three fingers were moved about until it could be felt. (b) Changing the hand also helped to find the pulse. 3. The number of pulsation
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1.0 BASIC FEATURES OF SARVA SHIKSHA ABHIYAN Sarva Shiksha Abhiyan is an effort to universalise elementary education by community-ownership of the school system. It is a response to the demand for quality basic education all over the country. The SSA programme is also an attempt to provide an opportunity for improving human capabilities to all children‚ through provision of community-owned quality education in a mission mode. 1.1 WHAT IS SARVA SHIKSHA ABHIYAN A programme with a clear time frame
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Exp dtmf n advantages of dtmf over pulse dail mech Draw n explain caller id What do u mean by cross talk n exp diff types of cross talk What do u mean by side tone and its importance Exp pagging system in detail Draw n exp functional block diagram of telephone set Dual-tone multi-frequency signaling (DTMF) is used for telecommunication signaling over analog telephone lines in the voice-frequency band between telephone handsets and other communications devices and the switching center. The
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