In this section we shall define the complex number system as the set RÂ Ã—Â R (the Cartesian product of the set of reals, R, with itself) with suitable addition and multiplication operations. We shall define the real and imaginary parts of a complex number and compare the properties of the complex number system with those of the real number system, particularly from the point of view of analysis.

Author(s): The Open University

Careers and employability
Careers and employability - UNSPECIFIED Keywords:UNSPECIFIED
Author(s): No creator set

Nuclear Magnetic Resonance - Phenacetin
Andrew Hall compares the sounds of bells to the frequencies of chemicals captured by a Nuclear Magnetic Resonance spectrometer. http://blogs.bath.ac.uk/csct/2016/a-chemical-chorus/
Author(s): No creator set

Women and Minorities In WWII
Women and minorities served in greater numbers than they did during the First World War. Some 333,000 women enlisted, about a third of them in the Women's Army Auxiliary Corps (Wacs). Women in the other branches were known as Waves (Navy) and Spars (Coast Guard), but female marines had no distinctive designation. Women were employed in non-combat roles but many of themâ€”especially nurses and pilots who ferried planes to the theaters of warâ€”found themselves in dangerous situations.
Author(s): No creator set

Algebra Tiles - A Virtual Manipulatives
Add tiles to the workspace
Click on any of the buttons below the workspace to add a tile to the workspace. Drag the tile to the desired location on the workspace. Dragging a tile to the left or bottom axes will make it a factor of a product you are representing.
Rotate tiles
Move your mouse over the corner of a tile. A round dot will appear that can be used to rotate the tile by moving the mouse in a circular motion. When you release the mouse

Author(s): No creator set

One way of explaining and analysing a system is to represent it in a graphical form, known as a system map. I'll use the example of a system for making an appointment with a doctor in a health centre to illustrate this point. In this example, the health centre uses a computerised booking system and the patient may phone or visit the health centre to make an appointment. Therefore, the system includes a patient, a receptionist, a doctor, and a computerised booking system. The example sh
Author(s): The Open University

Divers found the high girders lying on their sides in the shallow water of the river bed a short distance away (Figure 22), within which the almost intact remains of the train itself was found. No bodies were recovered because they had all been washed away by the river or tide. Although bodies were recovered i
Author(s): The Open University

An approach is a way of going about taking action in a â€˜real worldâ€™ situation, as depicted in Figure 20. As I have outlined earlier, an observer has choices that can be made for coping with complexity. Here I am assuming that because this unit is about systems approaches, a choi
Author(s): The Open University

Histograms provide a quick way of looking at data sets, but they lose sight of individual observations and they tend to play down â€˜intuitive feelâ€™ for the magnitude of the numbers themselves. We may often want to summarize the data in numerical terms; for example, we could use a number to summarize the general level (or location) of the values and, perhaps, another number to indicate how spread out or dispersed they are. In this section you will learn about some numerical summaries
Author(s): The Open University

"U.S.-Cuban Academic Relations Part I: The Politics of U.S.-Cuban Exchanges"
Wayne Smith, Center for International Policy and Louis PÃ©rez, University of North Carolina-Chapel Hill.
U.S. and Cuban scholars involved in academic, scientific, and cultural research face significant difficulties in maintaining open and thorough dialogue with each other due to restrictions governing travel between the two countries. Such

Author(s): The Center for International Studies at the Univer

A potential problem for the feature integration theory is the fact that the time taken to understand the meaning of a printed word can be influenced by other, nearby words. Of itself, this is not surprising, because it is well known that one word can prime (i.e. speed decisions to) another related word; the example nurse â€“ doctor was given in Secti
Author(s): The Open University

Tectonic Plates and Plate Boundaries (WMS)
The earths crust is constantly in motion. Sections of the crust, called plates, push against each other due to forces from the molten interior of the earth. The areas where these plates collide often have increased volcanic and earthquake activity. These images show the locations of the plates and their boundaries in the earths crust. Convergent boundaries are areas where two plates are pushing against each other and one plate may be subducting under another. Divergent boundaries have two plates
Author(s): No creator set

Four Quarts make a Gallon
See what a: cup, pint, quart and gallon are in this short video clip. This silly (yet informative) video uses a 'Singing Rubber Chicken' to describe these common liquid measurements.
Author(s): No creator set

The document attached below includes the seventh section of Mountain building in Scotland. In this section, you will find the following subsections:

• 7.1 Introduction

• 7.2 Mid-Ordovician to Silurian sedimentation in the Midland Valley Terrane

• 7.2.1 Ordivician sedimentation

• 7.2.2 Silurian sedimentiation

• 7.2.3 Summary of Section 7.2

• 7
Author(s): The Open University

12.815 Atmospheric Radiation (MIT)
This is an introduction to the physics of atmospheric radiation and remote sensing including use of computer codes. Subjects covered include: radiative transfer equation including emission and scattering, spectroscopy, Mie theory, and numerical solutions. We examine the solution of inverse problems in remote sensing of atmospheric temperature and composition.
Author(s): McClatchey, Robert,Prinn, Ronald G

This free course provided an introduction to studying Sociology. It took you through a series of exercises designed to develop your approach to study and learning at a distance and helped to improve your confidence as an independent learner.

Author(s): The Open University

This brief review of leadership theories has indicated that there are no simple answers to what it is that makes some leaders more effective than others, and no single best leadership style or approach. What matters is that the style adopted should fit with the expectations of those being led and be consistent with the task at hand (that is, it should not ignore the specific characteristics of the task itself).

There are no simple answers, which is perhaps why this continues to be the s
Author(s): The Open University

9.012 The Brain and Cognitive Sciences II (MIT)
This course is the second half of the intensive survey of brain and behavioral studies for first-year graduate students in the Brain and Cognitive Sciences curriculum. Each module of this core course involves a series of overview lectures by leading researchers in the field. By offering a thorough introduction to the current state of the discipline while emphasizing critical thinking, the course aims to prepare students as cognitive scientists. Topics include: perception, attention, working memo
Author(s): Miller, Earl,Kanwisher, Nancy

Now that youâ€™ve learned how to do subtraction on paper, you might want to practice your new skills.

To practice subtracting whole numbers, including borrowing where necessary, go to the Practice Subtracting section of the Numbers website and click on Get sum. Then follow the instructions.

To practise subtracting decimals, go to
Author(s): The Open University