Fabrice Muamba, jail and racist tweets

When does being offensive become an offence?

Liam Stacey, who wrote racist tweets following the collapse of Fabrice Muamba, is a vile idiot. But should he have gone to jail for what he wrote?

My first inclination is to think that regardless of the despicable things he said in the wake of the footballer's near-fatal collapse during a Bolton-Spurs game the other week, this man should not be put in jail for what he has written. To jail people for expressing racist views is to make martyrs of these people, to legitimise their sense of entitlement and victimhood, to reinforce the idea that we're living in a PC world where free speech has been outlawed in favour of politically correct speech.

I certainly don't wants to live in a country in which people aren't allowed to be offensive, appalling and even racists if they want to be. But where does conflict and debate between passionate and partisan football fans - I fear I must at this point introduce the word "banter", which is more often than not used to excuse despicable behaviour as being somehow a blokey get-out-of-jail-free card -- become a crime? When does being offensive become an offence?

There's a sense in which "banter" of a fairly unpleasant nature is and always has been part of football. Vile chants about Hillsborough and Munich still carry on, gloating about death and misery. Manchester United's Korean star Park-Ji Sung gets told he eats dogs; Liverpool supporters get told they eat dead rats. The hate levels rise. When players collapse, the cry of "Let him die!" goes out - though maybe not so much after the events at White Hart Lane.

Which isn't to say football fans are a horrible bunch, because there's a whole world of funny terrace chants, of genuine sporting rivalry and friendly animosity. Up and down the country every weekend, fans of opposing teams sit and have a drink together and tell each other to "have a good match" when they part to take their seats in opposite ends of the ground.

But in some cases, the rivalry spills over into violence, threats and crime. Where do you draw the line? Sometimes, the justice system gets involved and has to decide what's "banter" and what has strayed into something darker. There's now legislation to clamp down on sectarian chanting and abuse in Scotland, with the introduction of the "Offensive Behaviour at Football and Threatening Communications Bill", with a particular focus on football.

This isn't the first case in recent times of a tweeter landing in trouble for what they have written on the social networking site -- Sunderland fan Peter Copeland was recently given a community order after making racist tweets about Demba Ba and the number of black players in the Newcastle United side during some "banter" with a fellow fan.

What, then, was different about Stacey's tweets? In my opinion there are some differences that take it beyond simple trash-talking. The problem with talking about this subject is that to repeat what Stacey wrote is to repeat some truly awful things -- and most deemed by the judge, too awful to repeat.

His original tweet carried an "#haha" hashtag when the player had collapsed. He followed this up with a number of insults aimed at people who'd taken offence to that comment, widely retweeted by those who were shocked.

I suppose one test with these things is whether they would be offences if you walked up to someone in a pub and said them. While the "Fuck Muamba" tweet is disgusting, it's not targeted hate at one person to hurt them, whereas I think the others are, and have a racial element which only makes it worse. Are they threatening and hurtful words and behaviour? Do they incite racial hatred, more importantly? Stacey admitted the offence with which he was charged.

Much as I don't want to live in a world in which people's tweets are censored and scrutinised, we do live in a world in which bright, articulate footballers like Micah Richards feel forced to quit Twitter after being on the receiving end of a slew of racist tweets.

So what is to be done about it? Football has a long way to go before it can say it really has kicked out racism, and there really is a line between what's acceptable as a slanging match, or abuse, and out-and-out threats and incitement.

Sometimes, that line does get crossed, and Stacey has 56 days of his life to reflect on that.

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Patrolling the murkier waters of the mainstream media
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Inside Big Ben: why the world’s most famous clock will soon lose its bong

Every now and then, even the most famous of clocks need a bit of care.

London is soon going to lose one of its most familiar sounds when the world-famous Big Ben falls silent for repairs. The “bonging” chimes that have marked the passing of time for Londoners since 1859 will fall silent for months beginning in 2017 as part of a three-year £29m conservation project.

Of course, “Big Ben” is the nickname of the Great Bell and the bell itself is not in bad shape – even though it does have a huge crack in it.

The bell weighs nearly 14 tonnes and it cracked in 1859 when it was first bonged with a hammer that was way too heavy.

The crack was never repaired. Instead the bell was rotated one eighth of a turn and a lighter (200kg) hammer was installed. The cracked bell has a characteristic sound which we have all grown to love.

Big Ben strikes. UK Parliament.

Instead, it is the Elizabeth Tower (1859) and the clock mechanism (1854), designed by Denison and Airy, that need attention.

Any building or machine needs regular maintenance – we paint our doors and windows when they need it and we repair or replace our cars quite routinely. It is convenient to choose a day when we’re out of the house to paint the doors, or when we don’t need the car to repair the brakes. But a clock just doesn’t stop – especially not a clock as iconic as the Great Clock at the Palace of Westminster.

Repairs to the tower are long overdue. There is corrosion damage to the cast iron roof and to the belfry structure which keeps the bells in place. There is water damage to the masonry and condensation problems will be addressed, too. There are plumbing and electrical works to be done for a lift to be installed in one of the ventilation shafts, toilet facilities and the fitting of low-energy lighting.

Marvel of engineering

The clock mechanism itself is remarkable. In its 162-year history it has only had one major breakdown. In 1976 the speed regulator for the chimes broke and the mechanism sped up to destruction. The resulting damage took months to repair.

The weights that drive the clock are, like the bells and hammers, unimaginably huge. The “drive train” that keeps the pendulum swinging and that turns the hands is driven by a weight of about 100kg. Two other weights that ring the bells are each over a tonne. If any of these weights falls out of control (as in the 1976 incident), they could do a lot of damage.

The pendulum suspension spring is especially critical because it holds up the huge pendulum bob which weighs 321kg. The swinging pendulum releases the “escapement” every two seconds which then turns the hands on the clock’s four faces. If you look very closely, you will see that the minute hand doesn’t move smoothly but it sits still most of the time, only moving on each tick by 1.5cm.

The pendulum swings back and forth 21,600 times a day. That’s nearly 8m times a year, bending the pendulum spring. Like any metal, it has the potential to suffer from fatigue. The pendulum needs to be lifted out of the clock so that the spring can be closely inspected.

The clock derives its remarkable accuracy in part from the temperature compensation which is built into the construction of the pendulum. This was yet another of John Harrison’s genius ideas (you probably know him from longitude fame). He came up with the solution of using metals of differing temperature expansion coefficient so that the pendulum doesn’t change in length as the temperature changes with the seasons.

In the Westminster clock, the pendulum shaft is made of concentric tubes of steel and zinc. A similar construction is described for the clock in Trinity College Cambridge and near perfect temperature compensation can be achieved. But zinc is a ductile metal and the tube deforms with time under the heavy load of the 321kg pendulum bob. This “creeping” will cause the temperature compensation to jam up and become less effective.

So stopping the clock will also be a good opportunity to dismantle the pendulum completely and to check that the zinc tube is sliding freely. This in itself is a few days' work.

What makes it tick

But the truly clever bit of this clock is the escapement. All clocks have one - it’s what makes the clock tick, quite literally. Denison developed his new gravity escapement especially for the Westminster clock. It decouples the driving force of the falling weight from the periodic force that maintains the motion of the pendulum. To this day, the best tower clocks in England use the gravity escapement leading to remarkable accuracy – better even than that of your quartz crystal wrist watch.

In Denison’s gravity escapement, the “tick” is the impact of the “legs” of the escapement colliding with hardened steel seats. Each collision causes microscopic damage which, accumulated over millions of collisions per year, causes wear and tear affecting the accuracy of the clock. It is impossible to inspect the escapement without stopping the clock. Part of the maintenance proposed during this stoppage is a thorough overhaul of the escapement and the other workings of the clock.

The Westminster clock is a remarkable icon for London and for England. For more than 150 years it has reminded us of each hour, tirelessly. That’s what I love about clocks – they seem to carry on without a fuss. But every now and then even the most famous of clocks need a bit of care. After this period of pampering, “Big Ben” ought to be set for another 100 or so years of trouble-free running.

The Conversation

Hugh Hunt is a Reader in Engineering Dynamics and Vibration at the University of Cambridge.

This article was originally published on The Conversation. Read the original article.