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The future of handheld scientific and graphing calculators (or pen + paper, for that matter) 7

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SNORGY

Mechanical
Sep 14, 2005
2,510
I had a few days off over the holidays, so passing the time in front of NFL football and World Junior hockey on TV (-25 C outside...), I started transferring iPad apps onto my new iPad Air. While doing this, I decided to search for new apps that emulate graphing calculators. I now have four such on both iPads: RCL-59 (TI-59), i41CX+ (HP-41CX), i48 (HP-48GX) and HP50G (HP-50g).

I went through university using a TI-59, and I have never been converted to the RPN cult, which gave rise to the purchase of my post-university calculators, both TI: a TI-81 and the one I use now, a TI-89 Titanium. In light of that, and perhaps because I am now in a physical and cerebral midlife crisis, I rationalized that having the three HP emulators wouldn't do me much good without having the original calculator manuals, so I found and downloaded all of them in PDF format - in aggregate, thousands of pages of documentation. Feeling nostalgic, I decided to pick up my TI-89-T and teach myself how to program it, which is something I always wanted to do but never took the time. I hooked it up to the PC and refreshed myself with the associated TI Connect software and various user documentation. After an evening spent between that and doing some on-line web searching related to a gamut of pseudo-related topics, I came across some articles and points of view that were thought-provoking and somewhat disturbing.

There is a rapidly growing camp that shares the opinion that handheld calculators of any kind are already obsolete, and have been for about a decade. But for the fact that educators mandate their use (by association, forbid the use of iPads, iPhones, PDA devices and certain models of scientific / graphing handhelds) on examinations, there would no longer be a market for them. More disturbing was the suggestion that Texas Instruments has been able to gain and maintain the vast majority of the market share by working collaboratively with educators and textbook authors to implement an educational system in which the course material in math and science curriculae is integrated with their technology, indeed to the point where you need one in order to succeed in the other. It is further suggested that this alone will perpetuate the necessity and, therefore, existence of calculators (particularly TI calculators) long beyond what would otherwise spell their demise. This might explain why you don't find a lot of TI calculator apps for the iPad or iPhone, since it wouldn't make a lot of sense to spend several hundreds of dollars on a device when an equivalent app could be purchased for 5% of the cost.

I personally like calculators. I like the look and feel of them, and I like the fact that they do exactly what they are designed to do (for the most part - bugs aside). I like picking up a pencil, ruler, eraser and calculation paper pad and solving a problem, using a calculator to the extent required in support of this endeavour. However, I have an iPad at work with numerous good apps installed - Math Studio for example - that replaces a lot of the functionality that my calculator used to have. I also have a PC workstation with two big screens and MS Office. I am now in a mode at work where most of the time I spend pushing buttons on my TI-89-T is in a conference room in design review meetings; even then, I often pull out my iPhone for unit conversions because using the app is faster than pushing the buttons on the calculator.

My question is twofold (threefold maybe):

After graduating from school, are handheld calculators worthless due to their apparent obsolescence relative to emerging technologies?

For that matter, is the combination of "calculation paper + pencil + eraser + ruler + calculator" obsolete and worthless?

With the increased use of and dependence on current and emerging technologies, are we still nevertheless educating students and producing practitioners that "can do the math" rather than simply "correctly enter the data" and, if indeed we are, then are folks like me who still "go retro" and "do things Old School" becoming more worthless and obsolete?
 
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I have nothing to add to the calculator discussion that you geeks haven't already pounded to dust- other than to say that if I need to do a calc more than a couple times, I do it in a spreadsheet. I have a TI calculator in my bag, but I rarely get it out any more. I hate the sack of crap on my phone- should get an app for a better one I guess. I more or less ignore my phone already until I need to call somebody with it- then I turn it on...otherwise it's too much like a leash.

My 0.5 mm mechanical pencil used to be like an extension of my arm. Then it became a 0.7 mm because I broke 0.5 mm leads too fast- stress built up over the years I guess. I've always liked dark lines and B leads, but they're not that strong. Now I almost exclusively use Pilot Frixion eraseable pens- great contrast, as cleanly eraseable as a pencil and way better than a pencil crayon, but with no smudging or leads to break- and available in umpteen colours AND as highlighters too!. Rare is it that something so fundamental as a PEN has been improved so dramatically!

 
When quick calculations need to be run a calculator is a very efficient tool to perform these. Trigonometric functions, and basic algebra are performed very fast on a calculator. Sure spreadsheets and smart phones have the power to perform such calculations, but is anything going to perform as fast as a handheld scientific calculator? I'm sitting at a computer with my smartphone to my left and Casio fx-115ES on my right. My phone has a calculator app that can perform the exact same functions as my casio. However, if I have to find the product of 874x35.4 I have three choices.
#1 I can press the on button on my calculator, type in the formula and have the answer
#2 I can unlock my phone, load up my calculator app, and then run the formula.
#3 I can load up excel and enter the formula and perhaps have to format the size of the cell to fit my result.
The first choice is going to be faster every single time. Saving an additional 18 square inches of desk space isn't worth it.
Caveat, this is for desktop applications only.
 
molten, I have also noticed that 0.5 lead breaks more often than it did in the past. So what if it isen't us, but the lead that is getting weaker.

Mostly I use a mechinical pencel given to me by a vender, and I do't know what type of lead it has. But I don't have a breakage problem, most of the time.

I don't use excel as much for calculations, because it is very clumsey for complex numbers, and the old TI work well with them.
 
Perhaps the pencil companies are now using a carbon-graphite composite. When considered in that perspective, it becomes easier to rationalize what's been happening to hockey sticks over the past few decades.
 
Upon arriving at my current employer, I went hunting for pencils... nada. Brought a package from home. Sharpener? Nope. Pads of paper? You gotta be joking. I'd arrived into an environment so completely computer-oriented that nobody even took notes or put ink on the paper when making drawing corrections. As the youngest one here, I felt odd - so anachronistic. I've dived in feet-first and now I'm the guy with the colour pencils and 3 different hardnesses of art pencils, and rulers, sketch pads, the works. I'm tempted to roll in a drafting board beside my desk.

Over the years, I've used my pocket calculators so much that I have worn out at least 3 of them. For those of you who are curious, the AC/ON key just stops working some day and you either can't turn it on, or clear the memory to start a new calculation. They last between 5-10 years.

I use Excel a lot, now. But before, I used MathCad very extensively. I really liked the algebraic interface, that looked just like math without all the lines of programming, and I got it to do some pretty nifty things.


STF
 
Strange how work stops when the power isen't there, and very few companies consider backup power.

We do have a beckup generator here, but strange how the critical circuits include the pop and candy machines.

Engineering shoulden't stop when the power is off. After all who is going to fix it if no work is done.

Yea we need to have the old backup methods.
 
I liked the idea of Mathcad, but the implementation, not so much.

I couldn't remember how to drive it if I skipped a day.

I never forgave it for crashing my home computer, which didn't have a genuine Intel brand 80387 (because the game store I bought it from on a weekend only had 'clones'.).
Mathcad didn't check for the chip's particulars at startup and exit with a warning. It just went ahead, and crashed in a way that did a lot of damage.



Mike Halloran
Pembroke Pines, FL, USA
 
Back when I was still working in the real world and we first started to get Deskstop electronic calculators someone hung-up a cartoon showing an abacus in a glass case on the wall with a sign that stated: "In case of power-failure, break glass".

Of course, later on when we installed our first CAD system someone found another cartoon only now the abacus had been replaced by an 'Etch-a-Sketch'.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.
 
Can't speak to that particular version of Mathcad, but M15 is pretty reasonable and not particularly prone to crashes. If there were something as easy to use and as capable, Mathcad would have died a long time ago. But the reality is that it's still the only game in town if you care about units.

TTFN
faq731-376
7ofakss

Need help writing a question or understanding a reply? forum1529

Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
 
...the only game in town if you care about units.

That's exactly what I use MathCAD for 50% of the time, especially for things like power, heat, fluids, when working in clumsy US units.
When I do really complex stuff, I always try to conserve units, which includes defining new units (things like kPa are not built in, but Pa are, so you can add new ones at will). It's very helpful to get to the end of an analysis and find that the calculation of power actually ends up giving you Watts, not Watts per second or Newtons per meter, which will also give you an indication of where the mistake might be.
Sometimes it's fun to invent units that don't exist, such as a "sagan" which is 4x10^12 stars (ie. "billions and billions") and use them in MathCAD. Well, some people find that fun.



STF
 
My favorite 'made-up unit' was always 'Furlongs per Fortnight'.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.
 
Not made up anymore; both units were permanently incorporated into Mathcad quite a while ago. furlong/fortnight = 0.1663 mm/s

TTFN
faq731-376
7ofakss

Need help writing a question or understanding a reply? forum1529

Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
 
JohnRBaker,

Furlongs and fortnights are valid units, whether or not MathCAD recognizes them. Wait until someone tries to use cubits.

--
JHG
 
I never suggested that either furlongs or fortnights were not valid units. After all, I worked 14 years for a British company (at their American subsidiary in Saginaw, MI) and while I can't recall the term furlongs ever being used, I often heard my British counterparts use the term fortnight when discussing a project status or when talking about delivery schedules and such. It was only years later when I started to work for a CAD vendor that the subject even came-up as to whether, when using the system to solve engineering problems, were we limited to units hard-coded into the expression system (AKA 'formula builder') or could a user define his own units if they were more germane to what he was doing than what was provided OOTB (Out Of The Box)? Well the answer was, "Yes you can." and when asked, I would always show them how to create a new unit for velocity, in this case, Furlongs/Fortnight, being that it was about the most outrageous thing I could think of, so as to make the point. As for your comment about the practicality of using 'cubits' as a unit of length, well, we are selling our software to several large ship-building concerns, so who knows...

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.
 
My first encounter with furlongs per fortnight was in Mr. Stark's Physics class in 1974, as his response to what units velocity should be in.

TTFN
faq731-376
7ofakss

Need help writing a question or understanding a reply? forum1529

Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
 
I was just going to say that your teacher was probably trying to make a point as well. Perhaps if you could recall the precise context in which the question was asked, it might help you understand why you got the answer that you did ;-)

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

To an Engineer, the glass is twice as big as it needs to be.
 
Back in university, when solving problems in strength of materials, I once wrote "N-km" instead of the traditional "kN-m" for a bending moment on a homework problem. I was not marked wrong. I tried the concept on some of my classmates, many of whom found it confusing, or thought I should had it marked wrong. But maybe they were just annoyed at how I thought the whole thing was so funny.

STF
 
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