Tuesday, April 7, 2015

From Dusk to ... Dusk

February 22nd - a lazy Sunday morning. Open up Facebook and notice a post from Rob van den Bergh in the Pretoria East MTB Facebook Group:

Hi all - I am looking for MTB riders to join me on a ride from Cullinan2Tonteldoos. This amazing adventure is open to 50 cyclists who either want to 'go the distance', 'hop-on, hop off' or even do the last 80kms - you choose. The places will be taken VERY quickly - so be quick to Book your Seat!

My interest perked. 220km - it would be a stretch. I'd only cracked the 100km MTB mark a few months back in September on a ride from Van Gaalens to Breedts Nek, and put in 3 triple digit rides since (albeit just over the 100km mark). It was also Easter weekend, and the never-ending family / cycling conflict played in the back of my mind. But to be safe, I put in my entry.

On the afternoon of April 3rd, I headed through to Pretoria to meet up with Robert. Robert was also doing the ride - on a 26" single speed! From there, we headed through to Cullinan to meet up with some of the other Pretoria guys with whom I've had the privilege or riding with before: Christiaan and Heinz, who I'd met at a WTF hill challenge, Wilhelm who had broken his 100km cherry with me in September and a couple of others. Bikes were unloaded, lights attached, kit donned and quickly wolfed down a couple of pizza slices before a brief briefing and then we were off.

More prepared than usual....

The ride started off with a 20km roll from Cullinan mine entrance to the Onverwacht school to drop off soft toys and Easter egg marshmallows. Riding into the school gave me goosebumps as we high-fived the kids lining the road, with lit candles, singing and chanting. A quick delivery, and we were off the tar and heading east.

Race Briefing with Paul and Rob.

The evening's riding was pleasant - easy paced and relatively flat with gently rolling hills. The ride had an eery feel as we turned off our lights on some sections, guided by the almost-full moon. It was good to get to know some riders better and meet new ones (thanks to Christiaan, Wilhelm and Rob, could not have asked for better company). A quick stop at the 35km WP1 and we continued east. 1 of the few unpleasant patches of the evening ride was a strip of soft sand around 45km in - easy gear, weight off the front wheel and high cadence needed to spin through the momentum drain. I'd pumped my wheels up to 2.5 bar to lesson the rolling resistance which wasn't great for this environment. But, we all got through and carried on. We could almost smell the cappuccino’s at the 70km WP2, the perfect drink at 1am after a few hours riding!

 Waterpoint 2 @ 70kms - Cappuccinos and snacks

We reached a road crossing around 2am / 85km after my first twinges of tiredness, and I'd reached there a couple of minutes ahead of the riders heading up the rear. I figured it was time for a quick 3 minute power nap, the first of the evening. I had barely closed my eyes, when the Debbie from WildTrail on the support quad was waking me up. "Excuse me, are you ok". I sat up with a start to see the tail lights of the group disappearing into the night, nearly being left behind! The combination of 5 minutes of shut-eye and an adrenaline-boosted awaking nicely shook the bit of fatigue I'd started feeling.

The rest of the evening's riding was soul-food: solo mission in my own rhythm and time for some mental / intellectual filing. It felt like the most uneventful section - 1 short wrong turn, and the 1 or 2 slightly steeper climbs. Another stop at 100km to refuel, after which I decided to stretch my legs a bit for 23km, reaching the Loskop Dam Nature Reserve gate in just under an hour. This gave me time to slip in a 20 minute power nap, very welcomed at 4am. Little did I know that Murphey was also riding this section, and we turned around to ride back a whopping 500m into the gate, with a 1 hour wait for the reserve's representatives to meet up with us and confirm the route to the end of Stage 1. No warm clothing or blankets in the cool outdoors can be overcome by tiredness, and the 60 minute snooze recharged me even more. Experiencing the descent from the reserve boundary to the stage 1 / stage 2 transition area was rich and fulfilling: a loose, rocky, steep drop down (13km, -350m) while watching red-orange burning clouds suck the sun up over the horizon, only to blanket it with greyness shortly after had some parallels to how body and mind were feeling.

We spent just over an hour at the transition, with delicious bacon / egg wraps, a shower and a change of kit, and then headed off on the next leg: supposedly 80km with a fair amount of climbing.

Transition: fed, showered, and ready to go...

Rob had mentioned that there was a 9km climb about 20km in - enough of a ride to warm up the legs before stretching again. I decided to use a bit of a boost for it, and had 1 Gu down about 10 minutes before reaching the gate. The timing was perfect, and the 300m ascent was almost enjoyable. Even more enjoyable was the treat waiting for us at the top, at Farmer Marius' Emangweni Game Farm. Peanut butter sarmies, easter eggs and a cold pool to relieve aching knees were just what the doctor ordered, complimented by a stunning view of Mpumalanga

Good to go: 172km to Emangweni Game Reserve

The next section was where the wheels started their first wobble: the field was narrowed down a fair bit as many riders opted for a "hop off" to the next WP (which was on top of another serious climb) and 1 or 2 other logistical issues cropped up (e.g. Robert's single speed was loaded onto a support vehicle and then taken to the end instead of the next WP, counting him out of any more riding). WP7 at an abandoned farm was never seen (not sure if I missed it, or it wasn't there...), but the 18km / 400m ride to WP8 was another strong 1 for me, reaching it in under an hour. Waiting for the rest of the group, mother nature decided to have a say, and a cool wind and drizzle started picking up. Sitting and waiting in the wet and cold is not pleasant after 200km of riding. But... only 20km to go... or so I thought.

The group of now 20 riders were eager to get going, with more riders still due to reach the stop. With the weather playing up, we changed routine, and rode on before the support vehicles had caught up with us. This proved to nearly end the ride prematurely for me, as I had only loaded up enough snacks to get to WP8. Coupled with a misunderstanding of "only 15km to the end", I started the last haul in now steady rain and cold wind with only a handful of fruit/nuts for sustenance.  24km later, after a knee-deep river crossing and some unridden climbs through rocky veld, my Garmin beeped it's last beep for the ride, having fully discharged itself. My body, seemingly somehow connected, followed suit about 3 minutes later - I hit a wall comparable to that of China's; or, in the words of Alex Harris: The Uruk Hai had come.

Crawling along, I passed some other riders, either waiting for their partners or waiting for a rescue mission. 1 rider was kind enough to share some biltong with me, giving enough of a boost to trodge along for another 3km or 4km while kindly informing me that there was still 15km and a big climb ahead. When I saw Paul's (Rob's son) car, a mixed sense of relief and defeat filled me. A lift home! In retrospect, it was fortunate for me that his car wasn't able to carry my bike. Waiting in the sanctuary of his back seat for his brother Mark to pick me up, with heaters on, slowly but consistently munching on baked potatoes, topped up the carbs and settled the mind enough to decide: I must go on, time to unpack the spare sense of humour.

8km more - in just over 40 minutes, I reached the top of Where the f#@k is Tonteldoos, passing Rob and shouting out the segment name as I passed, slowly rolling in to the show grounds, with Robert and his wife patiently waiting in the cold for the trip back home. 

Distance: 240km
Elevation gain: 2,800m
Moving time: 12h30
Elapsed time: 20h

Friday, April 26, 2013

One of the reasons why I love where I work

This was taken from one of our planning systems...

Monday, January 21, 2013

Gravity and the quantum forces: exploratory thoughts on unification

Our universe is constantly being explored and analyzed, and the biggest challenge in physics today is a unified theory that can explain everything. From the sub-atomic quantum world to the macrocosmic universe of galaxies, quasars and supernova.

The world as we know it is explained in terms of 4 forces, described in order of scale from large to small: Gravity - a force that mass exerts on all force, as explained by Mr. Newton over 300 years ago ; The electro-magnetic force as first described to some accurate extent by James Clerk Maxwell in the early 20th century, which is the force that stops us from walking through walls and matter from occupying the same space, and is powering your PC as you read this; And then the 2 quantum forces, the weak nuclear force, responsible for radioactive decay and initiates fusion in stars; and the strong nuclear force, responsible for binding neutrons and protons in an atomic nucleus, a force which when harnessed, destroyed Hiroshima;

One problem faced by physicists and cosmologists is providing a single theory that considers all 4 forces together. Gravity (Einstein's theory of General Relativity) works well over large distances with a lot of mass, while the other 3 forces operate at tiny atomic scales. When the theories are combined, they produce unpredictable, wild results. And while in our given world as we know it today, we can safely use seperate theories to explain the big world and the small world in different terms, we can't do so  under extreme conditions, such as the early stages after the creation of the universe, 13.7 billion years ago. Or in black holes, where immense gravitational forces causes matter to collapse to tiny scales, where both sets of theories are required to explain and predict the behaviour (huge mass - GR, tiny scale - quantum). It is from this necessity that a number of theories have developed, the most popular being String theory and the more evolved M-theory.

There is a very interesting characteristic of quatum particles. In traditional physics, when we think of matter, we think of it as built from atoms, tiny particles arranged together. Even modern day scientists used to consider matter as particles. Until an extraordinary quatum discovery. An experiment was developed that can be used to determine whether something is matter or energy: the double slit experiment. If you're not familiar with it, hit play:

Now consider this: at a quantum scale, particles exist as a wave of potential, a state of possiblity. When  observed, the wave function is collapsed and the wave becomes a point. This is how we experience matter: a single position of a particle out of potentially thousands. As we stop observing, the matter returns to a state of potential.

On the other side of the scale, in the macroscopic level, the world as we know it exists primarily in collapsed particle form. Our constant observation of the world around us holds in it a state of position, of matter. Your table and chair. The roof over your head right now. The atmosphere. The earth. The sun. The andromeda galaxy: all particles in very definite positions.

To go off on a quick tangent. There is an overwhelming similarity in structure betwen an atom and a solar system
  • A central nucleus, being orbited by electrons / planets
  • The centron / nucleus is positive, consisting of protons (positive) and neutrons (neutral). It is massive, compared to electrons. The sun is positive, consisting of hyrogen ions (positive) and helium atoms (neutral). It is massive, compared to the planets.
  • The electrons are negatively charged. The planets are negatively charged. For example, the earth carries around 500 000 C of electric charge (think of the free electrons in our atomosphere that cause lightning). 

There is one characteristic that is, quite different. The atom's particles exist as waves of potential. The macroscopic universe, through observation, exists in a state of collapsed matter. Without mathematical formulas to back this concept and based more on concept, could there be some correlation between the structure of atoms and molecules, the structure of solar systems and galaxies, and the weakness of gravity compared to electromagnetism and the nuclear forces? If energy of a system were compared to water, then think of the amount of force required to contain a certain volume of water with potential, for example by containing it with a balloon. The balloon exerts considerable force around the water to hold it together in 3 dimensions. Now consider the same balloon of water, and the amount of force required at only a single point, for example the neck of the balloon. A fraction of force is required at a single point - all you need to do is stick your finger in to stop the water running out.

Given that quantum theories explain a system of wave potential, then surely the force to maintain the system is a wave function too. And given that cosmological models and general relativity are based on particle physics and the forces in these systems are only 1 dimension of the force in a wave potential system, then it could it be possible to expand on GR and thinking of the current cosmological parameters as the set of parameters for a single point of a function?

There are some challenges that cosmology faces today. One of the biggest is providing an explanation of the total mass-energy of various systems (e.g. galaxies). "Baryonic pressure" - visible matter - only accounts for about 4% of the total mass-energy that can be calculated (this is determined by observing rotational velocities of galaxies and orbital movements around large gravity systems). About 25% is attributed to dark matter, and 70% to dark energy - matter and energy that we to date have not been able to observe. Observe? As Dr. Quantum says: "The act of OBSERVING collapses the wave function". Maybe it happens in the bigger picture too (albeit on a completly different time scale).