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An Introduction to Clinical Trials
George Warimwe from the Kenya Medical Research Institute (KEMRI)/Wellcome Trust Research Programme in Kilifi, Kenya presents an introduction to clinical trials aimed at trial site staff and anyone new to the field. Topics covered include: equipoise and hypothesis, protocol, trial design, comparative effectiveness, pharmacovigilance, ICH-GCP basics, informed consent, essential documents, databases and statistics.
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6.450 Principles of Digital Communication I (MIT)
The course serves as an introduction to the theory and practice behind many of today's communications systems. 6.450 forms the first of a two-course sequence on digital communication. The second class, 6.451 Principles of Digital Communication II, is offered in the spring. Topics covered include: digital communications at the block diagram level, data compression, Lempel-Ziv algorithm, scalar and vector quantization, sampling and aliasing, the Nyquist criterion, PAM and QAM modulation, signal co
Author(s): Feizi-Khankandi, Soheil,Médard, Muriel

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3.4.1 Try some yourself

1 A new train operator boasts ‘Train times reduced by 12%’. Decrease 90 minutes by 12%. Give your answer as minutes and seconds.

Answer

A 12% decrease would reduce
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ESD.04J Frameworks and Models in Engineering Systems / Engineering System Design (MIT)
This class provides an introduction to quantitative models and qualitative frameworks for studying complex engineering systems. Also taught is the art of abstracting a complex system into a model for purposes of analysis and design while dealing with complexity, emergent behavior, stochasticity, non-linearities and the requirements of many stakeholders with divergent objectives. The successful completion of the class requires a semester-long class project that deals with critical contemporary is
Author(s): Sussman, Joseph

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5.2 Vibrating string: speed of wave propagation

If standing waves are set up when two travelling waves moving in opposite directions interact, then how are standing waves set up on a string and why are they set up only at certain frequencies?

To help answer these questions, I want you first to imagine a length of string that is fixed at one end and held in someone's hand at the other. Suppose the person holding the string flicks their end of the string in such a way that an upward pulse is sent along the string.

As the pulse pa
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Introduction
Alexander Holmes

Some Rights Reserved

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Exponent Property Review
In this video, the instructor reviews 5 different exponent properties: sum/difference, product, quotient, power, and integral/rational.  He begins by defining each property and providing simple examples of each.  He then goes through different exponent problems that require the use of various properties in order to solve them. (10:59)

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1.6 Points, planes, lines and distances in three-dimensional Euclidean space

We now study three-dimensional space, 3. This is a space with which you are familiar, of course, as ‘the real world’ is a three-dimensional space.

We define a coordinate system in three-dimensional space via three m
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How the Unemployment Rate is Defined and Computed
OpenStax College
By the end of this section, you will be able to: Calculate the labor force percentage and the unemployment rate Explain hidden unemployment and what it […]

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Study another free course

There are more than 800 courses on OpenLearn for you to choose from on
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Salmon Akhtar on The Trauma of Geographical Dislocation
Salmon Akhtar on The Trauma of Geographical Dislocation, how immigration can affect a person's mental health.
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Lesson 01 - One Minute Romanian
In lesson 1 of One Minute Romanian you will learn how to say 'hello' and 'goodbye' in Romanian. Remember - even a few phrases of a language can help you make friends and enjoy travel more. Find out more about One Minute Romanian at our website - http://www.oneminutelanguages.com.Author(s): No creator set

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17.537 Politics and Policy in Contemporary Japan (MIT)
This subject is designed for upper level undergraduates and graduate students as an introduction to politics and the policy process in modern Japan. The semester is divided into two parts. After a two-week general introduction to Japan and to the dominant approaches to the study of Japanese history, politics and society, we will begin exploring five aspects of Japanese politics: party politics, electoral politics, interest group politics, bureaucratic politics, and policy, which will be broken u
Author(s): Samuels, Richard J.

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Founders Day lecture 2013: Trust and transparency in public life and business
Lord Tugendhat, the Chancellor of the University of Bath, talks about trust and transparency in public life and business.
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Job Growth Doesn’t Mean We’re Getting Richer

In response to recent claims by the Obama administration and others that “millions of jobs” have recently been created, I examined the data here at mises.org to see if the claims were true. It turns out that job growth since the 2008 recession has actually been quite weak, and hardly something to boast about.

Nevertheless, our conclusions from these analyses tend to rest on the idea that job growth is synonymous with gains in wealth and economic prosperity.

But is that
Author(s): Ryan McMaken

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Rights not set

Slave Resistance and the Underground Railroad
This video is accompanied by text. "During the 1850s, Americans witnessed a decade of sectional crises that threatened the very existence of the Union. Ralph Waldo Emerson was right in predicting that the Mexican Cession would reignite the explosive issue of slavery expansion. The newly acquired territory lay beyond the Louisiana Purchase and therefore was not part of the Missouri Compromise of 1820. Californians were clamoring for statehood, the residents of Utah and New Mexico deserved territo
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Median of a Trapezoid
In this video students learn the definitions of a trapezoid, an isosceles trapezoid, and the median of a trapezoid. Students also learn the following theorems related to trapezoids. The base angles of an isosceles trapezoid are congruent. The median of a trapezoid is (a) parallel to the bases and (b) has a length equal to the average of the lengths of the bases.

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{Suresh 892} Nice sentences
{Suresh 892} Nice sentences अच्छे वाक्य (achhey vaaky) इसका वांछित (desired) परिणाम (results) नहीं निकलेगा| ( Iska vaanchhit parinaam nahin nikalegaa.) This will not yield the desired results. मेरे पास […]

1.4.4 Case study 1: Vic Harris – a hospital death

Vic was a 68-year-old man with a long history of chronic (pulmonary) obstructive airways disease and was therefore a regular in-patient at the medical ward of the local hospital where he received treatment. Vic had been on Crawford Ward for two weeks and was feeling very concerned that he was not making any progress. Previously he had experienced quite a marked improvement after a few days’ treatment but this time, instead of improving, his breathlessness and lethargy were getting worse and
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