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An introduction to computers and computer systems
Digital & Computing

An introduction to computers and computer systems

...careful thought was given to choosing sequences of values for the characters of the alphabet and numerals that would make it easy for a computer processor to perform common operations on them. (These encodings were preserved in the 8-bit system by simply padding out the leftmost bit with a 0.) To illustrate, let’s look at the 8-bit encoding of some of the lower-case and...
View course An introduction to computers and computer systems
Level 1: Introductory 16 hrs
Managing complexity: a systems approach
Society, Politics & Law

Managing complexity: a systems approach

...careful to explore the world as fully as I can because I cannot see everything and may be misled. The third pole is to take on fully the implications of the world's unknowability. This stance demands that I always carry an awareness that I will never know the world and must therefore always be trying to account for my own role in my perceptions of the world. Consciously...
View course Managing complexity: a systems approach
Level 3: Advanced 20 hrs
Climate change
Nature & Environment

Climate change

...careful experimental work had established what others only suspected: expressed in modern scientific terms, certain atmospheric gases absorb infrared radiation with wavelengths in the range spanned by outgoing terrestrial radiation (about 4 to 100 μm; Figure 5). These are the greenhouse gases. Tyndall identified water vapour and CO2, but the list of natural greenhouse...
View course Climate change
Level 2: Intermediate 18 hrs
Ewch â’ch addysgu ar-lein Badge icon
Education & Development

Ewch â’ch addysgu ar-lein

...Adult Learning, Efrog Newydd, NY, Macmillan. Vygotsky, L.S. (1986) Thought and Language (wedi’i gyfieithu o’r Rwseg a’i ddiwygio a’i olygu gan A. Kozulin), Cambridge, MA, Gwasg MIT. Wenger, E. (1998) Communities of Practice: learning, meaning and identity, Caergrawnt, Gwasg Prifysgol Caergrawnt...Wythnos 2: Darganfod y cysylltiadau: egwyddorion a damcaniaethau ar...
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Level 2: Intermediate 24 hrs
Getting started on ancient Greek
History & The Arts

Getting started on ancient Greek

...adult males, cast votes for a citizen to be exiled for ten years. If at least 6,000 votes in total were cast, then the citizen with the most votes was ‘ostracised’ (or, on an alternative interpretation, 6,000 votes had to be cast against a single individual). More than 10,000 ostraka have been unearthed at excavations in Athens, in the agora (the marketplace or...
View course Getting started on ancient Greek
Level 1: Introductory 16 hrs
An introduction to minerals and rocks under the microscope
Science, Maths & Technology

An introduction to minerals and rocks under the microscope

...careful study of minerals in thin sections is a key part of the interpretation of igneous, metamorphic and sedimentary rocks. If you'd like an interactive overview of the geological makeup of the landscape of the British Isles, take a look at our Geology Toolkit. This OpenLearn course provides a sample of level 2 study in Science...An introduction to minerals and rocks...
View course An introduction to minerals and rocks under the microscope
Level 2: Intermediate 8 hrs
A freelance career in the creative arts Badge icon
History & The Arts

A freelance career in the creative arts

...care not to overcommit. Find some time for yourself between commitments and deadlines...Week 1: What is a creative freelance career?: 4.2 The planned approach - The planned approach differs to the organic approach in that it is less opportunist and more deliberate. For example, you may decide to work part time in formal employment to support yourself while developing your...
View course A freelance career in the creative arts
Level 1: Introductory 24 hrs
Understanding science: what we cannot know Badge icon
Science, Maths & Technology

Understanding science: what we cannot know

...careful and take the time into account. The ionised gas that we now see as the CMBR will have since condensed into atoms, stars and galaxies. Cosmologists have long been guided by what is called the ‘cosmological principle’. This states that on the very largest scales the universe is generally ‘homogeneous’ (all places are alike) and ‘isotropic’ (all...
View course Understanding science: what we cannot know
Level 1: Introductory 24 hrs