451 search results

Hat makers, Greek gods and the great poisoners
Science, Maths & Technology

Hat makers, Greek gods and the great poisoners

...Liquid mercury drops on a pit black background.] Drops of liquid mercury It is worth pausing to consider what is meant by toxicity with regard to a compound. The German physician Paracelsus explored the relationship between dose and response. To paraphrase his conclusion: All things are poison and nothing without poison. Solely the dose determines that a thing is not a...
What can you do with leftover coffee grounds?
Science, Maths & Technology

What can you do with leftover coffee grounds?

...liquid fuel Like most plant seeds, the coffee bean contains a significant amount of oil which can either be squeezed out or chemically extracted. It can then be converted into biodiesel, a liquid with similar properties to that of regular diesel. My own research found coffee-derived biodiesel wasn’t affected by where the coffee was grown, the type of bean or how it was...
Fused deposition modelling (FDM)
Science, Maths & Technology

Fused deposition modelling (FDM)

...solid and translucent colours) polyphenylsulfone (selected for high-strength applications) PETG (impact resistant, but higher density than ABS). Design: Component design is limited by the following: Strength and thoroughness can be influenced by many factors including time of build, atmosphere and even polymer colour. Overhanging regions need extra designing. Structures...
Exploring the depth of the Antarctic ice sheet...
Nature & Environment

Exploring the depth of the Antarctic ice sheet...

...solid ground with the ice sheet. Field campaigns are essential to understand these interactions but would not allow spatial resolution on the continental scale that is required. One avenue is to use satellite data but the information gained is limited as the technology is yet to be developed to look beyond the thick ice. In this project, the aim is to use computer model...
Freud: The Expert View
Health, Sports & Psychology

Freud: The Expert View

...liquids. Unconscious feelings may also show themselves in distorted form in dreams. The goal of Freudian dream interpretation is to unravel the different kinds of distortion which mask the motivations underlying the dream. Freud also thought slips of the tongue and the mistakes we make were motivated by unconscious conflicts and feelings. The second base of Freud’s...
How much electronic waste do we generate as a species?
Science, Maths & Technology

How much electronic waste do we generate as a species?

...Solid Waste Association — published in The Global E-waste Monitor 2017, lays blame on falling prices that make electronic devices affordable and widely available. In developing countries, a growing middle class with disposable incomes means that more electronic goods are being bought and replaced more frequently, according to the study. Asia, with its growing economies,...
Ireland cycling history: whizzing in all directions
History & The Arts

Ireland cycling history: whizzing in all directions

...solid-tyred, two-wheeled machines were propelled slowly along Ireland's poorly maintained roads by the rider pushing pedals on the front wheel. They were soon rendered obsolete by the development in the early 1870s of the Ordinary, popularly known as the 'Penny-Farthing'. Like the boneshaker, the Ordinary was propelled by the rider pushing pedals on the front wheel, but...
Europa’s icy shell
Science, Maths & Technology

Europa’s icy shell

...liquid water ocean, which may rise through the icy crust, creating subsurface lakes that freeze and cause the overlying ice to fragment, float and resettle into new ‘chaotic’ positions (Figure 1). This ice bares resemblance to icebergs here on Earth. The ice that creates these features is water ice, but by performing multiple surface flybys of Europa, Galileo and Juno...