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Posted on: Mon, 2018-06-18 - 22:09 By: admin

The Joys of RPN (Reverse Polish Notation) when calculating complex equations

"Hewlett Packard introduced their HP 35 in 1972. It was the world's first scientific calculator. It could be considered a little geeky in that it forced the user to learn a data entry system known as Reverse Polish Notation (RPN), which was closer to the way the internal computer chip handled the process. What thousands of scientists and engineers discovered, however, was that this data entry system was closer to the way their brains processed the problems too. RPN is addictive. If any serious science or math student asks my recommendation on a calculator, RPN is it. The HP 35s was issued on the 35th anniversary of the original HP 35."

I cut my own teeth with RPN back in 1983 with my HP41CV when I studied engineering (I still have this calculator and it still operates). RPN becomes more and more advantageous as the calculations become complex. The video below attempts to explain this. Once the theory is understood you rarely even require more than two or three of the stacks. RPN is actually a very efficient way of calculating.

So considering that... do today's school learners actually learn RPN at all?

Watch the RPN explanation at https://www.youtube.com/watch?v=cPKg_JtI-Ys

#RPN #hewlettpackard #calculators


Posted on: Mon, 2018-06-18 - 21:34 By: admin

Why the bizarre ‘Bus Simulator’ games are the perfect remedy for stress

Because some gamers believe their favourite game genre (whatever type it is) is the only game everyone should be playing... There are lots of different games for lots of different folks. Each have their own appeal and following, and some also play games for relaxation and stress relief...

"Finding relaxing games that don't immediately bore me to tears is pretty tough. BS18 adds depth to its gameplay while staying in its simplistic lane—which makes it the perfect remedy for anxiety. Simulations like BS18 aren't adrenaline pumping, but they are an excellent pre-bedtime ritual. Just be ready to find yourself counting passengers instead of sheep."

See https://mashable.com/2018/06/18/bus-simulator-18-review/


Why the bizarre ‘Bus Simulator’ games are the perfect remedy for stress
'Bus Simulator 18' is way more than an exercise in boredom.
Own your very own "live steam" locomotive built by Roundhouse Engineering in Doncaster England admin Sun, 2018-06-17 - 20:35

Own your very own "live steam" locomotive built by Roundhouse Engineering in Doncaster England

A "live steam" engine is one which is actually driven by steam which has been produced by heating water until it boils, just like the real thing.

Water is heated inside a sealed container (the boiler) until it boils and produces steam. It is kept boiling while ever steam is required. Because this process is contained within the boiler, the pressure of the steam increases to a pre-determined limit and it is this pressurised steam that is drawn off as required to power the cylinders.

A safety valve is fitted to the boiler to prevent the steam pressure rising above its normal operating level. On Roundhouse models, this is 40 psi (pounds per square inch) which is about 2.7 bar. When the steam pressure reaches this level. the safety valve opens and allows excess steam to 'blow off' to atmosphere.

All their standard locomotives are all gas-fired using mixed propane-butane gas which is the simplest method of heating the water. The gas is stored in a special tank mounted on the locomotive and fed, via a gas regulator valve, to a burner mounted either outside the boiler (externally fired) or inside a flue which passes right through the boiler from one end to the other (internally fired). Whichever the method, whenever the burner is lit it is heating the water to produce the steam. The rate at which steam is produced is controlled by the gas regulator. Turning it up increases the heat at the burner and thus the amount of steam produced whilst turning it down has the opposite effect.

Steam drives the loco as it passes from the boiler through a regulator valve and down to the cylinders. In the cylinder it pushes a piston from one end to the other; first one way then the other. The piston is mounted on a rod (piston rod) which is attached by a special swivelling joint (the crosshead) to a second rod, (the connecting rod) which in turn is connected to the wheel or crank. As the piston is pushed backwards and forwards, it causes the wheel to rotate. The steam has to be sent to each end of the cylinder in turn and the used steam must exhaust up the chimney. This is taken care of by a valve in the valve chest mounted either on top or at the side of the cylinder. It must also do it at the right time on every stroke of the piston and this is accomplished by means of the valve gear. The amount of steam passing to the cylinders is controlled by the steam regulator.

See their website at http://www.roundhouse-eng.com or watch a short video from https://youtu.be/YR15XznsLZI?t=1h18m58s

#steamlocomotive #modelrailways


Posted on: Sat, 2018-06-16 - 20:41 By: admin

Milan’s New Diesel Ban To Cause Ripple Effect

The city of Milan is getting set for a progressive ban on diesel cars, due to start as early as January 2019. The bold move was announced a few days ago by Milan’s mayor Giuseppe Sala at the annual Energy Festival in Rome. “It will be a delicate transition, but we think it’s time to do it,” said Sala.

While the announcement was unexpected – and very welcome by Greenpeace Italy representatives, who immediately expressed their praise and support – it shouldn’t come as too much of a surprise. Political pressure on diesel cars has been mounting for some time, particularly following Volkswagen’s Dieselgate scandal. Further, Milan has a history of strong environmental policies and has already been implementing increasingly strict anti-pollution measures on vehicle traffic for a number of years. Most notably, a “congestion charge” scheme very similar to the one implemented in London, called Area C, is already in place for the historical town center. The new scheme will however encompass a wider area, to include the whole of the city.

The news from Milan should not be underestimated. The implications of such an extensive ban on a popular choice of engine – 43% of Italy’s car fleet, with diesel sales enjoying an incredible 55% market share in recent years including 2017 – will be evident very soon. For starters, sales of new diesels in the Milan area (albeit of the Euro 6 kind, unaffected by the scheme) will undoubtedly take a hit as citizens will prefer to avoid the risk of future stranding of their car. In turn, cleaner vehicles sales will benefit from an equivalent boost in numbers as people are forced to shift away. Further, the policy may prove to be of particular incentive towards pure electric models, which will be seen as the obvious choice by those who want to future-proof access to the city streets.

See https://cleantechnica.com/2018/06/15/milans-new-diesel-ban-to-cause-ripple-effect/

#diesel #milan


Milan’s New Diesel Ban To Cause Ripple Effect | CleanTechnica
The city of Milan is getting set for a progressive ban on diesel cars, due to start as early as January 2019. The bold move was announced a few days ago by Milan's mayor Giuseppe Sala at the annual Energy Festival in Rome. The brave message on the transition to clean transport is a welcome milestone set to cause a ripple effect way beyond its city limits
Posted on: Sat, 2018-06-16 - 19:35 By: admin

Learn about traditional wet shaving and how it can turn shaving from a chore into something you look forward to each morning

The average guy will spend thousands of hours shaving over his lifetime. So isn’t it worth investing a bit of your time to learn the best way to do it? You’re probably giving yourself a sub-optimal shave without even realizing it.

If you’ve never tried wet shaving before, you’re really missing out. Not only does traditional wet shaving leave you looking and feeling your best. You also feel like a badass while doing it.

I used to hate shaving every morning. It was such a chore. I just wanted to get it over with. When I discovered traditional wet shaving, it changed everything for me. Shaving became something of a ritual—something I actually enjoyed doing each day, and actually looked forward to!

Read this guide at http://www.thedistilledman.com/traditional-wet-shaving-guide/

#wetshaving #traditionalwetshaving #shaving


A Guide to Traditional Wet Shaving | The Distilled Man
Learn about traditional wet shaving, including the basic shaving gear you'll need to start, how to use a classic safety razor and shaving brush, and more.
Posted on: Sat, 2018-06-16 - 19:26 By: admin

The Ultimate Collection of Quotes on Fatherhood

We invariably make more of a fuss over Mom on Mother’s Day than Dad on Father’s Day.

Dads are like a steady but less sentimentalized institution — the sun in our familial sky that warms and gives life but isn’t much thought about unless he goes missing.

Yet this belies the enormous impact fathers truly have on their children; while a dad’s nurturing may often take the form of playful roughhousing and silly jokes, his influence is quite serious and significant: the presence of a loving father greatly increases a child’s chances of success, confidence and resilience, physical and mental well-being, and yes, quite naturally, their sense of humor.

One of the manifestations of the way we take fathers for granted is that there exist many more quotes about Mom than dear old Dad (and even fewer about fathers and daughters). To make more accessible those great pearls of wisdom that do exist, we searched high and low for the very best, and created this ultimate treasury of quotes about fatherhood. These short quotations provide great prompts for reflection; typically, we’re so busy plowing ahead that we don’t pause to look up and get a “birds-eye” perspective on things — taking the time to ponder what our own dads meant to us, and the way we’re shaping, and should be savoring, our kids right now.

See https://www.artofmanliness.com/articles/the-ultimate-collection-of-quotes-about-fatherhood/

#fathersday #fatherhood


The Ultimate Collection of Quotes About Fatherhood | The Art of Manliness
Fathers tend to be taken for granted. We invariably make more of a fuss over Mom on Mother’s Day than Dad on Father’s Day, for one. Dads are like a steady but less sentimentalized institution — the sun in our familial sky that warms and gives life but isn’t much thought about unless he goes …
Posted on: Sat, 2018-06-16 - 14:16 By: admin

The 6 Best Pidgin Chat Plugins For Linux Users - The most interconnecting messenger out there?

Linux users know that if they want to use a serious IM client, the only choice is Pidgin. It has dozens of features and as a result has become the go-to app for most, even today. One of the strongest features of Pidgin is that it supports plugins. With the plugin aspect of Pidgin IM, users can quickly add (or remove) features they like and improve the overall program experience in their own way. If you’re new to using Pidgin on Linux and interested in plugins, you may not know where to start. That’s why in this article, it's going to go over the best Pidgin chat plugins that Linux users should check out.

See https://www.addictivetips.com/ubuntu-linux-tips/best-pidgin-chat-plugins-for-linux/

#pidgin #messengers


The 6 Best Pidgin Chat Plugins For Linux Users
The 6 Best Pidgin Chat Plugins For Linux Users
Posted on: Sat, 2018-06-16 - 12:58 By: admin

How to Use Chromecast to Create a Dashboard on Your TV using Dashboard Cast

Wouldn’t it be nice if all of that information that you need in the morning would be in one place? What if you could get your news, weather, and calendar without switching between apps and devices? Use Google’s Chromecast and the Dashboard Cast app to display all this news on your television.

Things that could only be viewed on a phone or computer in the past can now be seen on a large screen thanks to Chromecast. The potential of the Chromecast is growing every day with the addition of new Chromecast-enabled apps. There are thousands of different apps for listening to music, viewing television shows and movies, playing games, sports and more.

One of the features available for your Chromecast turns your television screen into a personal dashboard. This dashboard utilizes the space on your screen to display information widgets that you choose and customize. There are options for calendars, weather forecasts, daily news, and a to-do list, just to name some. With Dashboard Cast enabled, turning on the television in the morning gets you all the up-to-date information you need.

See https://www.maketecheasier.com/chromecast-create-dashboard-tv/

#chromecast #dashboardcast


How to Use Chromecast to Create a Dashboard on Your TV - Make Tech Easier
The potential of the Chromecast is growing every day with the addition of new Chromecast enabled apps. Creating a TV dashboard is only one of them.
Posted on: Sat, 2018-06-16 - 11:54 By: admin

Action Launcher v37 adds Desktop Shortcuts and faster settings

Action Launcher has become my regular use launcher on my Pixel 2 XL phone for the last few months. Although not packed with some of the richer features of Nova launcher, I'm finding it a tad more stable and faster.

One thing I still miss and have suggested to the developers is to allow a custom icon for folders. For some reason, they either show four mini icons (pixel launcher style) or the first app's one (but with a swipe up which I don't really like).

But it's fast and stable and does everything else I want it to.

See https://ausdroid.net/2018/06/16/action-launcher-v37-adds-desktop-shortcuts-faster-settings/

#actionlauncher #android


Action Launcher v37 adds Desktop Shortcuts and faster settings - Ausdroid
For fans of Chris Lacy's Action Launcher, a new update awaits this morning with V37 rolling out thro
Posted on: Sat, 2018-06-16 - 11:47 By: admin

Why Open Source Needs Marketing (Even Though Developers Hate It)

The concept of creative commons is far older than the advent of Linux some 25 years ago. Like creative commons, word of mouth has long been the foundation of open-source marketing. Indeed, it is how open source has grown its community of contributors. Talk to just about any developer, however, and they’ll tell you they don’t want to be marketed to -- not in the traditional sense, anyway.

So, what role does marketing have and what value does marketing bring to the open-source community?

In my fifteen years of marketing -- several of them for open-source projects, including my current role -- I’ve learned that marketing is absolutely essential to open source’s ability to thrive. I may be a bit biased, but hear me out. What does open source need most? Code contributors. Community. Adoption. All the code and community in the world will be useless if no one adopts it. And user adoption won’t happen without marketing.

It might help if we reframe marketing as advocacy. You need passionate people dedicated to advocating for open source’s success and adoption. That’s where marketing (or advocacy, if you prefer) can help.

The bottom line is that "success" is ultimately measured in perceived value and usage by users... and marketing (or advocacy) is what helps makes this happen.

Read the full article at https://www.forbes.com/sites/forbescommunicationscouncil/2018/06/13/why-open-source-needs-marketing-even-though-developers-hate-it/#77b17393425b

#marketing #advocacy #marketing


Why Open Source Needs Marketing (Even Though Developers Hate It)
Marketers must recognize and champion the importance of the community for open source to thrive.
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