• Earth Day 1970 Part 10: Earth Week 2of3 Philadelphia (CBS News with Walter Cronkite)
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    Earth Day 1970 Part 10: Earth Week 2of3 Philadelphia (CBS News with Walter Cronkite)

    – [Man] Radio and television stations have given free air time. (eerie orchestra music) – [Man] There’s a problem about the air, the water and the Earth. It’s being ruined. That’s what Earth Week is all about. – [Man] What it’s all about is trying to convince everyone in Philadelphia that industrial activity like this has serious drawbacks as well as advantages. And the Earth Week committee wanted to reach more than just students. They wanted help from people like Mrs. Rita Cugini, the wife of a fireman in Southwest Philadelphia. Mrs. Cugini did become involved in Earth Week. When you think about it, when you walk around your own…

  • Earth Day 1970 Part 1: Intro (CBS News with Walter Cronkite)
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    Earth Day 1970 Part 1: Intro (CBS News with Walter Cronkite)

    – This planet is threatened with destruction and we who live in it, with death. The heavens reek. The water is below a foul. Children die in infancy. And we, and the world, which is our home, live on the brink of nuclear annihilation. We are in a crisis of survival. – [Anchor] This is a CBS News Special. Earth Day. A question of survival. With CBS News correspondent, Walter Cronkite. – Good evening, a unique day in American history is ending. A day set aside for a nationwide outpouring of mankind seeking its own survival. Earth Day, a day dedicated to enlisting all the citizens of a bountiful country…

  • 2.6 Population Conclusion
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    2.6 Population Conclusion

    In conclusion, ha, we’ve seen in our population lecture series, how human populations have grown over historical time, we’ve identified areas of tremendous human concentration, population density concentration We’ve identified current population totals for our world regions. We’ve looked at the dynamics of how societies evolve in this lovely demographic transition, which changes the birth rates and death rates and fertility rates and therefore population totals around the planet. We’ve even looked at issues which run counter to our tiny preconceptions about how these populations evolve over time. Now many of you are asking at the end of all this, So what? [Laughs] Why is any of this useful to…

  • Earth Day 1970 Part 10: Earth Week 1of3 Philadelphia (CBS News with Walter Cronkite)
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    Earth Day 1970 Part 10: Earth Week 1of3 Philadelphia (CBS News with Walter Cronkite)

    – [Walter] One of the biggest Earth Day observances was in Philadelphia, where an estimated 20-40,000 persons gathered in perfect weather in the city’s largest park. It was an Earth Day success story: a major demonstration in a major city. But, it did not come easily. There were many organizational problems, including a heated controversy over whether to accept financial aid from industries causing pollution. David Culhane followed the Philadelphia story from its start to today’s colorful demonstration. (upbeat hippie music) – [David] Fairmount Park in Philadelphia today. As much like a rock music festival, as a teach-in on the environment. A few older people, a few blacks, and some…

  • APA Essay Format (7th ed.) | Essay Writing | The Nature of Writing
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    APA Essay Format (7th ed.) | Essay Writing | The Nature of Writing

    In this video I’d like to show you how to format your essay using the APA guidelines, 7th edition. Now, with the 7th edition there are some changes, and in particular students no longer have to supply an abstract or a running head. If your instructor does ask for one of those things, then just stay tuned for the end of the video and I will cover these items there. The first thing you want to do in your essay is [to] provide a page number. There are a couple of ways to do this in Microsoft Word. You can simply double click at the top of your page, and…

  • 2.1 Introduction to Population
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    2.1 Introduction to Population

    World population. People, people everywhere on the planet. Where are they? Seems like some parts of the planet got lots of people packed into them, other parts not so much so, maybe nobody home at all. How many peoples are alive on the planet right now? Where are these peoples at? Why are they there? How fast are they growing or shrinking? Ah, all excellent questions in studying world population demographics, that is the study of people themselves. And this is something that states around the planet are extremely concerned about, understanding the demographics of their countries to understand what’s going on now, and also understand what’s happening in the…

  • 2.5 Population Prediction Problems
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    2.5 Population Prediction Problems

    Let’s wrap up our world population unit with some population prediction problems. That’s right, now that we’ve learned all these great models and theories, let’s throw a big monkey wrench into all of it because there are some things which mess up this tidy nice predictable stuff that we’ve been covering and they’re important enough to understand so you get what’s happening in the world. Problem one is compounding people’s making compounding problems. And this is something we’ve referenced many times in the past, I’ll go over one more time that is population growth rate when fertility rates are high is exponential, it’s not mathematical. So, when you’re over that…

  • 1. Collective Behavior, from Particles to Fields Part 1
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    1. Collective Behavior, from Particles to Fields Part 1

    The following content is provided under a Creative Commons license. Your support will help MIT OpenCourseWare continue to offer high quality educational resources for free. To make a donation, or view additional materials from hundreds of MIT courses, visit MIT OpenCourseWare at ocw.mit.edu. PROFESSOR: Alright. So what we are doing is covering 8.334, which is statistical physics. ANd let me remind you that basically statistical physics is a bridge from microscopic to macroscopic perspectives. And I’m going to emphasize a lot on changing perspectives. So at the level of the micro, you have the microstate that is characterized, maybe, by a collection of momenta and coordinates of particles, such as…

  • Randomly Select a Sample from a Population in SPSS
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    Randomly Select a Sample from a Population in SPSS

    In statistics, we want to learn about a population, but instead of measuring everyone, we rely on only a small sample of the entire group. Then we take what we learn from that sample, and apply it to the population. But how large does that sample need to be in order to represent its population? How many people do you need so that the mean of the sample is the same as the mean of the population from which it was drawn? Is a sample of 30 enough? More? We are going to use a massive data set and treat it as a population, and then draw some samples to…

  • 2.2 Population: How Many People & Where
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    2.2 Population: How Many People & Where

    World population Let’s start with some basics, shall we? How many people are alive on the planet right now? Where are these people at? How did it get to be that way? Ah, those are complicated questions. Let’s start with the easy one first. There’s seven billion people alive on the planet right now, give or take 100 million here or there. That’s seven billion with all be. It’s a seven with a hell-load of zeros after it. Now, has that always been the case? One might make the logical assumption that this number of seven billion has been achieved over a slow steady progression over human history of hundreds…