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Sydney Harbour
WEEKLY NEWSLETTER 12 - 17 AUGUST 2019

Hello and Welcome,

A link-free Newsletter? — Just a thought.

When delivering email, some ISPs reject messages if they contain links. This extreme caution results in the emails being bounced back to the sender, in this case to the Club's Newsletter at Gmail.

We are wondering, therefore, whether some members might prefer a link-free Newsletter. This will have the unfortunate consequence of providing NO links to any articles, NO downloads to other Newsletters such as that from ASCCA, and most importantly, no follow-up links to important Tech stories or information.

Even the most innocuous links, for example, to our own websites would be unavailable to the readers.

This has affected at most a handful of members (and not the same ones each week). I now look out for subsequent message bounces after the Newsletter is sent. I, too, have often been the target of this problem, so I have now added both my ISP and Gmail addresses to the mailing list, hoping that one of them makes it.

If you have experienced any missing Newsletters, could you please reply to this Newsletter (if possible) and we'll summarise responses next week.

Many thanks — Ed.

Meetings This Week:

Programming - Tuesday Aug 13th - 5:30 pm (6:00 pm meeting start) - 8:00 pm

The Prog Sig Meeting is on this Tuesday 13th August 2019, at 6pm, SMSA Pitt St Sydney.

The July meeting report is up.

See: https://­sites.google.com/­site/­progsig/­home­for the reports.

Please send me some text & photo if you'd like your discussion added to the web page, thanks.

See you Tuesday, I have some info on using an Arduino to capture and recreate InfraRed remote control codes for an air filter unit.

Please bring along a circuit or topic to discuss.

Regards,

Steve OBrien

A little C programming using GMP (GNU Multiprecision Arithmetic) which can produce millions of digits of Pi — We know that's something you've always wanted to do (especially on a Raspberry Pi).


/home/pi/mp/pi> time pi 1100 100

Dec No pi to 1100 decimal digits, 100 per line, 10 rounding digits:

1: 3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679
101: 8214808651 3282306647 0938446095 5058223172 5359408128 4811174502 8410270193 8521105559 6446229489 5493038196
201: 4428810975 6659334461 2847564823 3786783165 2712019091 4564856692 3460348610 4543266482 1339360726 0249141273
301: 7245870066 0631558817 4881520920 9628292540 9171536436 7892590360 0113305305 4882046652 1384146951 9415116094
401: 3305727036 5759591953 0921861173 8193261179 3105118548 0744623799 6274956735 1885752724 8912279381 8301194912
501: 9833673362 4406566430 8602139494 6395224737 1907021798 6094370277 0539217176 2931767523 8467481846 7669405132
601: 0005681271 4526356082 7785771342 7577896091 7363717872 1468440901 2249534301 4654958537 1050792279 6892589235
701: 4201995611 2129021960 8640344181 5981362977 4771309960 5187072113 4666666837 2978049951 0597317328 1609631859
801: 5024459455 3469083026 4252230825 3344685035 2619311881 7101000313 7838752886 5875332083 8142061717 7669147303
901: 5982534904 2875546873 1159562863 8823537875 9375195778 1857780532 1712268066 1300192787 6611195909 2164201989

1001: 3809525720 1065485863 2788659361 5338182796 8230301952 0353018529 6899577362 2599413891 2497217752 8347913151

real 0m0.036s
user 0m0.025s
sys 0m0.001s

0.036 seconds — not bad!

Ed.

Web Design - Saturday Aug 17th - 1:30 pm (2:00 pm meeting start) - 4:00 pm - TENTATIVE

Hi Everyone;

Our Web Design meeting is Saturday the 17th at 2 PM.

In June we had a look at the Transform property and this month I thought we could look at its big brother, writing mode.

Bruce Lawson once said it's the World Wide Web not the Wealthy Western Web in reference to the fact that so often designers ignore the fact that there are four major language types and only one writes left to right top to bottom. Writing mode is used to place content in a way that suits the language of the reader.

[ See more of Bruce's ideas at The Web Standards Project, making Tim Berners-Lee's vision of the web as an open, accessible, and universal community largely the reality. — Ed. ]

For us, writing mode can be used to create some impressive visual effects especially when combined with Flex and Grid start and end properties for justify and align items.

Last month we looked at Snap and if time is on our side, we may have a look at some JavaScript alternatives if your browser refuses to snap.

See you Saturday.

Steve South

Meetings Next Week:

Tuesday Forum - Tuesday Aug 20th - 9:30 am (10:00 am meeting start) - 12 noon
Main Meeting - Tuesday Aug 20th - 12:30 pm (1:00 pm meeting start) - 3:30 pm - DAYTIME-MEETING
Digital Photography - Friday Aug 23rd - 9:30 am (10:00 am meeting start) - 12 noon

Current & Upcoming Meetings:

55 2019/08/03 - 14:00-17:00 - 03 Aug, Saturday - Penrith Group
56 2019/08/09 - 09:30-12:30 - 09 Aug, Friday - Friday Forum
57 2019/08/09 - 12:30-15:30 - 09 Aug, Friday - Communications
58 2019/08/13 - 17:30-20:30 - 13 Aug, Tuesday - Programming
59 2019/08/17 - 13:30-16:30 - 17 Aug, Saturday - Web Design - TENTATIVE
60 2019/08/20 - 09:30-12:30 - 20 Aug, Tuesday - Tuesday Forum
61 2019/08/20 - 12:30-15:30 - 20 Aug, Tuesday - Main Meeting - DAYTIME-MEETING
62 2019/08/23 - 09:30-12:30 - 23 Aug, Friday - Digital Photography

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ASCCA News:

“ASCCA NEWSLETTER FOR AUGUST 2019”:

Greetings all,

The August issue of the ASCCA newsletter is attached available online.

This month you can read about:

  • SWADE NT
  • The noticeboard includes the dates for Queensland's Seniors Week. I do hope that one of the ASCCA clubs from Queensland will send us details of an event that ran to celebrate Queensland for all Ages.
  • SWADE NSW
  • A Members' Forum where we discuss how to make your club grow
  • Australian Access Awards
  • Family History Friday. Does your club have a Family or Local History group?
  • There are some more details about the Digital Photography Competition. Alert! Alert! The competition closes on 1 September
  • Safety by Design, go to page 4 to find out more.

Planning for the 21st Australian Technology Conference for Seniors is well under way and registrations are now open on our website, and the cost is the same as last year!

Fond regards,

Nan

Nan Bosler, AM
President
Australian Seniors Computer Clubs Association

ASCCA
Empowering Australian seniors through technology

Level LG | 280 Pitt Street | Sydney | NSW | 2000
P: (02) 9286 3871 | W: www.ascca.org.au
E: office@ascca.org.au
FB: www.facebook.com/ASCCAau

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Tech News:

“How to use Windows Sandbox in the Windows 10 May 2019 Update”:

See the Windows Central article by MAURO HUCULAK | 22 May 2019.

If you need to run an app, but you're not sure if it's safe, the May 2019 Update includes the Windows Sandbox feature designed for this kind of task — Here's how to use it.

Windows Sandbox is a new feature available beginning with the Windows 10 May 2019 Update (version 1903) designed to run untrusted applications inside a lightweight isolated environment running independently from your main installation.

Technically, Windows Sandbox is a virtual machine created on demand using Microsoft's hypervisor using the same OS image as the one on your machine. However, it's a very lightweight environment of around 100MB, which has been optimized to boot and run faster, its focus is on security, and it works more efficiently using integrated kernel scheduler, virtual graphics, and smart memory management.

Although you can create a virtual machine to accomplish a similar experience, there are some key benefits with Windows Sandbox. For instance, you don't need to spend additional steps creating or downloading a virtual machine. Every time you launch the feature, it runs a new clean installation of Windows 10. When you finish testing an application and close Windows Sandbox, everything gets deleted automatically. Also, using virtualization isolates anything occurring inside the environment from your main installation offering maximum security to test untrusted applications.

In this Windows 10 guide, we'll walk you through the steps to enable and get started using the Windows Sandbox feature available with the May 2019 Update.

Windows Sandbox system requirements

Before proceeding to enable and use Windows Sandbox, your device must meet the following minimum hardware and software requirements:

Windows 10 Pro (or Enterprise).
Hardware virtualization.
AMD64 architecture.
2 processor cores minimum (4 cores with hyperthreading is recommended).
4GB of RAM (8GB is recommended).
1GB of HDD space (SSD is recommended).

How to enable Windows Sandbox on Windows 10

The process to enable Windows Sandbox is straightforward using the Windows Features experience.

Enabling virtualization

Before you can enable Windows Sandbox, you must make sure that your device supports hardware virtualization and the feature is enabled in the Basic Input/Output System (BIOS) or Unified Extensible Firmware Interface (UEFI) firmware.

To check if your device supports virtualization, use these steps:

Open Start.
Search for Command Prompt and click the top result.
Type the following command and press Enter:

systeminfo.exe

Under the "Hyper-V Requirements" section, if "Virtualization Enabled In Firmware" reads Yes, then you can use Windows Sandbox.

[ We successfully tried this out on our Windows Pro version yesterday at the Comms SIG — Ed. ]

Read more »

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Bob Backstrom
~ Newsletter Editor ~

Information for Members and Visitors:

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