on the performance of a constant -on-time(COT)-controlled buck converter is studied and a pulse bursting phenomenon is revealed. It indicates that the ESR of the output capacitor is one of the key factors causing pulse bursting phenomenon in COT-controlled buck converters‚ and the critical ESR is derived via. It is pointed out that ‚ when the ESR of the output capacitor is smaller than the critical ESR ‚pulse bursting phenomenon occurs‚ otherwise it disappears. Simulation results are provided to verify
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using Multiple Governance Framework Monika Nangia Abstract Reflecting its deep commitment to universalizing access to and completion of elementary education of satisfactory quality by 2010‚ the Government of India (GOI) launched the Sarva Shiksha Abhiyan (SSA)‚ the National Program for Universal Elementary Education (UEE) The program provided a comprehensive policy and budgetary framework for achieving the goal enshrined in the 86th Constitutional Amendment (2002) of making elementary education a
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blood pressure. In this experiment‚ measurements of systolic arterial pressure‚ diastole arteriole pressure‚ and pulse rate were recorded and observed. The effects of changes in the body were observed and measured during body positioning‚ exercise‚ and cognitive stress. The purpose of this lab experiment was to test multiple variables that can have an effect on blood pressure and pulse. As stated‚ the following variables that were tested were changes in posture‚ exercise‚ and a cognitive stressor
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Animal Testing Gandhi remarks‚ “The greatness of a nation and it’s moral progress can be judged by the way it’s animals are treated.” Unfortunate animals everyday are getting poked and prodded in labs for human benefits. Animals are used to test many products‚ and the results aren’t always reliable. So how should people trust these experiments and the results they give? Unreliably Predict Results Animal tests do not reliably predict results that are what should be a benefit for human life. It
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Monostable mode: in this mode‚ the 555 functions as a "one-shot". Applications include timers‚ missing pulse detection‚ bouncefree switches‚ touch switches‚ frequency divider‚ capacitance measurement‚ pulse-width modulation (PWM) etc * Astable - free running mode: the 555 can operate as an oscillator. Uses include LED and lamp flashers‚ pulse generation‚ logic clocks‚ tone generation‚ security alarms‚ pulse position modulation‚ etc. * Bistable mode or Schmitt trigger: the 555 can operate as a flip-flop
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a charger that produces copious amounts of radiant energy or radiant pulses. Radiant energy pulses are indeed the back emf pulses themselves when they are very fast and sharp HF pulses. They are NOT transistor or switching transients! A spark gap produces classical radiant energy pulses. They are chaotic but radiant energy events never the less. Switching a coil on via a transistor very fast will produce one radiant energy pulse from the coils back emf. But one is no good. You need thousands and millions
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APPLICATION NOTE 1002 ISO LINK Isolink Optocouplers vs. Pulse Transformers In isolation applications where one needs to pass signals in presence of transient or continuous high voltages‚ reject extreme noise‚ and break ground loops‚ optical (optocouplers) and magnetic (pulse transformers) coupling isolation are often used. However pulse transformers are much more difficult to design with relative to optocouplers. When dealing with pulse transformers‚ the load becomes more critical than with any
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the elements of the test is taking the pulse rate of each student. Based on the SEGAK test conducted in your school‚ get the pulse rate of 50 students before and after the step up board activity. Complete the table below by using the data obtained. Students | Pulse rate(bpm – beats per min ) | | | Before | After | 1. | | | 2. | | | . | | | . | | | . | | | 50. | | | Table 1 (a) (i) Find the mean‚ mode‚ and median of the pulse rate after the step board activity for
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interpret collected data for heart rate‚ breathing rate and temperature before and after a standard period of exercise. In order to complete this exercise we had to work with another individual and take turns to accurately record the blood pressure‚ pulse and respiration and temperature results before and after undertaking the exercise. (Stretch‚ B.‚ & Whitehouse‚ M. (2007). We chose to do the Harvard step which consisted of a workout for fifteen minutes; we then completed the measure and repeated it
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Many parents are afraid to give their children vaccinations for multiple reasons. However‚ immunizations should become mandatory in order to prolong the existence of the human race and avoid the potential death of millions. The image I used represents the fear of vaccinations by many parents. The image not only shows the child screaming in pain from the vaccination‚ but also the mother seems to be in pain as well. The mother’s pain is represented by the scar on her forehead and the expression of
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