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Festival offers free coding workshops

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Africa Code Week will be coming at the Cape Town Science Centre from 15 to 23 October with a wide variety of free coding workshops and other related activities for all ages.

As part of the week’s activities, the Science Centre based in Observatory just in front of the Groote Schuur Hospital will host two free-entry Festival of Code days on the Saturdays 15 and 22 October.  In addition, free after-school coding workshops will be held every afternoon from 17 to 21 October.

“We know that coding is a critical 21sts Century skill that is easily learnt and loads of fun,” says Julie Cleverdon, director of the Cape Town Science Centre and global coordinator of ACW. “The motto of Africa Code Week is: ‘Coding is a new language. Every child deserves to be fluent.’ That’s why the Cape Town Science Centre is endeavouring to make as many relevant activities in this week accessible to everyone. We are grateful for the support from both Woolworths Financial Services and SAP for making this possible at our centre.”

Activities include coding, data story-telling and robotic workshops; talks from some of the most talented and inspiring young coders in Cape Town and a host of other activities in addition to the opportunity to interact with the many hands-on exhibits in the Cape Town Science Centre.  Even if you’ve never written a line of code in your life, the workshops on offer will get participants started one step at a time. They are styled to help encourage today’s young digital consumers to become tomorrow’s digital creators. Based around Scratch, a popular system adopted by millions of young learners worldwide as it fosters youthful curiosity, promotes creativity, and provides a basis for lifelong programming learning.

In addition to the Cape Town Science Centre’s efforts, other Cape Town organisations have embraced the initiative and are set to create a coding buzz by organising a host of coding activities across the city. Those interested in attending these activities can visit the Africa Code Week live map http://africacodeweek.org/activities/live-events/, which itemises the events taking place in Cape Town, and indeed across Africa.

Africa Code Week (www.africacodeweek.org.), first run in 2015, is a spearheaded by the software company SAP in association with the Galway Education Centre in Ireland and the Cape Town Science Centre. The first year of Africa Code Week sparked the interest of more than 89,000 children across 17 African countries to write their first lines of code. Of the 89 000 youth engaged continent-wide in 2016, almost 4,000 were from Cape Town and the Western Cape. This year the goal is to engage 150 000 children and youth in 30 African countries. Teachers and others in Cape Town can once again work towards achieving the goal for Africa Code Week in 2016 and empowering our youth.

To learn more about the activities for the Festival of Code taking place on the 15th and 22nd of October at the Cape Town Science Centre, visit (http://ctsc.org.za/festival-of-code-africa-code-week-free-entry/) or contact the Cape Town Science Centre on (021) 300-3200.

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Money talks and electronic gaming evolves

Computer gaming has evolved dramatically in the last two years, as it follows the money, writes ARTHUR GOLDSTUCK in the second of a two-part series.

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The clue that gaming has become big business in South Africa was delivered by a non-gaming brand. When Comic Con, an American popular culture convention that has become a mecca for comics enthusiasts, was hosted in South Arica for the first time last month, it used gaming as the major drawcard. More than 45 000 people attended.

The event and its attendance was expected to be a major dampener for the annual rAge gaming expo, which took place just weeks later. Instead, rAge saw only a marginal fall in visitor numbers. No less than 34 000 people descended on the Ticketpro Dome for the chaos of cosplay, LAN gaming, virtual reality, board gaming and new video games. 

It proved not only that there was room for more than one major gaming event, but also that a massive market exists for the sector in South Africa. And with a large market, one also found numerous gaming niches that either emerged afresh or will keep going over the years. One of these, LAN (for Local Area Network) gaming, which sees hordes of players camping out at the venue for three days to play each other on elaborate computer rigs, was back as strong as ever at rAge.

MWeb provided an 8Gbps line to the expo, to connect all these gamers, and recorded 120TB in downloads and 15Tb in uploads – a total that would have used up the entire country’s bandwidth a few years ago.

“LANs are supposed to be a thing of the past, yet we buck the trend each year,” says Michael James, senior project manager and owner of rAge. “It is more of a spectacle than a simple LAN, so I can understand.”

New phenomena, often associated with the flavour of the moment, also emerge every year.

“Fortnite is a good example this year of how we evolve,” says James. “It’s a crazy huge phenomenon and nobody was servicing the demand from a tournament point of view. So rAge and Xbox created a casual LAN tournament that anyone could enter and win a prize. I think the top 10 people got something each round.”

Read on to see how esports is starting to make an impact in gaming.

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Blockchain unpacked

Blockchain is generally associated with Bitcoin and other cryptocurrencies, but these are just the tip of the iceberg, says ESET Southern Africa.

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This technology was originally conceived in 1991, when Stuart Haber and W. Scott Stornetta described their first work on a chain of cryptographically secured blocks, but only gained notoriety in 2008, when it became popular with the arrival of Bitcoin. It is currently gaining demand in other commercial applications and its annual growth is expected to reach 51% by 2022 in numerous markets, such as those of financial institutions and the Internet of Things (IoT), according to MarketWatch.

What is blockchain?

A blockchain is a unique, consensual record that is distributed over multiple network nodes. In the case of cryptocurrencies, think of it as the accounting ledger where each transaction is recorded.

A blockchain transaction is complex and can be difficult to understand if you delve into the inner details of how it works, but the basic idea is simple to follow.

Each block stores:

–           A number of valid records or transactions.
–           Information referring to that block.
–           A link to the previous block and next block through the hash of each block—a unique code that can be thought of as the block’s fingerprint.

Accordingly, each block has a specific and immovable place within the chain, since each block contains information from the hash of the previous block. The entire chain is stored in each network node that makes up the blockchain, so an exact copy of the chain is stored in all network participants.

As new records are created, they are first verified and validated by the network nodes and then added to a new block that is linked to the chain.

How is blockchain so secure?

Being a distributed technology in which each network node stores an exact copy of the chain, the availability of the information is guaranteed at all times. So if an attacker wanted to cause a denial-of-service attack, they would have to annul all network nodes since it only takes one node to be operative for the information to be available.

Besides that, since each record is consensual, and all nodes contain the same information, it is almost impossible to alter it, ensuring its integrity. If an attacker wanted to modify the information in a blockchain, they would have to modify the entire chain in at least 51% of the nodes.

In blockchain, data is distributed across all network nodes. With no central node, all participate equally, storing, and validating all information. It is a very powerful tool for transmitting and storing information in a reliable way; a decentralised model in which the information belongs to us, since we do not need a company to provide the service.

What else can blockchain be used for?

Essentially, blockchain can be used to store any type of information that must be kept intact and remain available in a secure, decentralised and cheaper way than through intermediaries. Moreover, since the information stored is encrypted, its confidentiality can be guaranteed, as only those who have the encryption key can access it.

Use of blockchain in healthcare

Health records could be consolidated and stored in blockchain, for instance. This would mean that the medical history of each patient would be safe and, at the same time, available to each doctor authorised, regardless of the health centre where the patient was treated. Even the pharmaceutical industry could use this technology to verify medicines and prevent counterfeiting.

Use of blockchain for documents

Blockchain would also be very useful for managing digital assets and documentation. Up to now, the problem with digital is that everything is easy to copy, but Blockchain allows you to record purchases, deeds, documents, or any other type of online asset without them being falsified.

Other blockchain uses

This technology could also revolutionise the Internet of Things  (IoT) market where the challenge lies in the millions of devices connected to the internet that must be managed by the supplier companies. In a few years’ time, the centralised model won’t be able to support so many devices, not to mention the fact that many of these are not secure enough. With blockchain, devices can communicate through the network directly, safely, and reliably with no need for intermediaries.

Blockchain allows you to verify, validate, track, and store all types of information, from digital certificates, democratic voting systems, logistics and messaging services, to intelligent contracts and, of course, money and financial transactions.

Without doubt, blockchain has turned the immutable and decentralized layer the internet has always dreamed about into a reality. This technology takes reliance out of the equation and replaces it with mathematical fact.

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