Learning curve in psychology and economics The first person to describe the learning curve was Hermann Ebbinghaus in 1885. He found that the time required to memorize a nonsense word increased sharply as the number of syllables increased.[1] Psychologist‚ Arthur Bills gave a more detailed description of learning curves in 1934. He also discussed the properties of different types of learning curves‚ such as negative acceleration‚ positive acceleration‚ plateaus‚ and ogive curves.[2] In 1936‚ Theodore
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LABORATORY EXERCISE 8-A: Preparation of Bacterial Smear and Simple Staining I. INTRODUCTION Bacterial smears are prepared for the purpose of viewing microorganisms under the microscope. Visualization of microorganisms in the living state is very difficult‚ not just because they are minute‚ but because they are transparent and almost colorless when suspended in an aqueous medium. A bacterial smear is a dried preparation of bacterial cells on a glass slide. Smears may be made from a dry culture
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Limitations of the Lorenz Curve The Lorenz Curve illustrates the degree of equality (or inequality) of distribution of income in an economy. It plots the cumulative percentage of income received by cumulative shares of the population and includes a straight line to illustrate perfect income equality. Thus‚ the closer the Lorenz curve is to the straight line‚ the greater the equality in income distribution‚ while‚ the further away it is from the straight line‚ the more unequal the distribution
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Learning Curve Primer The concept of a Learning Curve is motivated by the observation (in many diverse production environments) that‚ each time the cumulative production doubles‚ the hours required to produce the most recent unit decreases by approximately the same percentage. For example‚ for an 80% learning curve: If cumulative production doubles from 50 to 100‚ then the hours required to produce the 100th unit is 80% of that for the 50th unit. The learning curve formula can be expressed
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The Laffer curve‚ named after the economist Arthur Laffer‚ is a curve that demonstrates the trade-off between tax-rates and tax-revenues (Wanniski 1978). It is used to illustrate the concept of taxable income elasticity‚ the idea that a government can maximise the revenue by setting the tax rates at an optimum point. This curve can be traced back as far as 1844 to a French economist Jules Dupit who in 1844 found similar effects as Laffer did (Laffer 2004). Dupit also saw tax revenues rising from
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Practical 9: Examination of Bacterial Plates Objective: 1. To examine bacteria pigmentation‚ colony‚ margin characteristics‚ elevation properties‚ broth characteristics and agar stroke properties. 2. To examine bacteria growth characteristics on different culture media. Introduction: Bacterial species can sometimes be identified on the basis of how they appear on or in the different media. The pigmentation‚ size and shape of bacterial colonies as they grow on and in agar plates can
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Bacterial Energetics and Membranes Abstract The Mg2+/Ca2+ ATP synthase present in all bacterial membranes‚ particularly E. coli‚ couples ATP synthesis to the proton (H+) gradient produced by the ETC‚ a process known as oxidative phosphorylation. The gradient acts to power the ATPase‚ so that it may phosphorylate ADP to produce ATP. The reverse reaction of this process‚ or hydrolysis of ATP into ADP and Pi‚ may be used to observe ATPase activity when the resulting Pi is quantitatively measured
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Bacterial Transformation Lab Introduction: In this experiment we transformed a strain of E. Coli bacteria without antibiotic resistance with plasmid DNA. This plasmid produces a fluorescent green glow under black light due to the gfp(green fluorescent protein) as well as antibiotic resistance. E. Coli cells will be plated on an agar medium‚ some with and some without the antibiotic ampicillin. Only bacterial cells that contain the plasmid will survive the ampicillin and produce the green glow
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10 Money Market and the LM Curve MACROECONOMICS Macroeconomics Prof. N. Gregory MankiwRudra SensarmaKozhikode Indian Institute of Management www rudrasensarma info www.rudrasensarma.info ® PowerPoint Slides by Ron Cronovich © 2013 Worth Publishers‚ all rights reserved Learning objectives & outcomes • Money Market & the LM Curve – Real Money‚ Real Income & Interest Rate y‚ – Deriving the LM Curve – Monetary Policy & the LM Curve 2 Financial Markets (Money Market) and the LM
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What are bacteria? Bacteria are tiny little organisms that are everywhere around us. We can’t see them without a microscope because they are so small‚ but they are in the air‚ on our skin‚ in our bodies‚ in the ground‚ and all throughout nature. Bacteria are single-celled microorganisms. Their cell structure is unique in that they don’t have a nucleus and most bacteria have cell walls similar to plant cells. They come in all sorts of shapes including rods‚ spirals‚ and spheres. Some bacteria
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