Hello,
First at all sorry for my bad English.
I would like to create a kind of lock with no internet connexion and a RTC inside.
The lock will open with a code 8 chars long. The chars can be from 0 to 9 and from A to D. (I use a 16 key keypad)
The main idea is to have a code generator that encrypt with this 14 chars (0-9 and A-D) a code that says to the lock : you will have to open from this date until this date. And because i want the code to work only with the serial of one lock the code have to be compatible only with the lock I create the code for.

So to resume :
I have a lock with a 16 keys that are 0-9 and A-D the last two are R for reset and V like run :)
The lock have a serial number could be 000 to 999
When I create the code the code have to contain on max 8 chars : the start date, end date and the serial of the lock.

I've tried some ideas like work with a base 14 or something like. Use a kind of offset from the a defined date that is the same on the lock and the generator and then use the difference from this date to create the start date. Use the serial of the lock to do a CRC so when the lock check the code if the CRC is not ok then it won't open.

Well as you see I'm getting lost so if you have a simple idea please help

Thanks a lot

What can you tell me about Expert Systems?

I work for a technology company where there are hundreds of very smart engineers such as Electrical Engineers, Chemical Engineers and Manufacturing engineers.

They are all very smart and skilled. But the downside of every one is they are human.

I look at Supercomputers, like Summit, by IBM (200 Trillion computations per second), as well as Watson, which I know very little about, and I worry that Watson could wipe out small businesses like the one I work for.

How close are Expert Systems like Watson from performing completed designs, automatically? Let's say, for example, an integrated circuit.

I am curious to hear what a company that sees Watson as their true competition can do on a shoestring budget to harness their own engineers knowledge in a form that can be coalesced into a internal use only decision support system.

The sky's the limit on your theories...This is a wide open question, meant to tickle the mind.

Thanks

Is this Statistical Question as simple as i hope it is...

If I have a 5 Minute Time Bar for measuring trade volume within a Stock Symbol (any symbol)

Which is 300 seconds in total (5 x 60 seconds in a minute = 300)  

and i divide the 300 seconds into 10 equal segments of time -- 30 seconds each

and i measure the buying volume that took place from trades during EACH of the 10 segments --- HOW DO I MEASURE THE RATE OF BUYING PER SEGMENT IN RELATION TO THE 10 SEGMENTS to quantify how smooth was the trading done... Measure the Variance ? How do i measure the consistency of the buying ?

For example:

If each of the 10 segments of 30 seconds had 1000 shares traded then the rate of trade volume consistency of trading per each segment would be exact or the same rate flow of volume

1000  - 1st segment
1000
1000
1000
1000
1000
1000
1000
1000
1000 - 10th segment

But in the real world you get more inconsistent flow something like this... and i would like to understand how to measure the variance here ?

1250 - 1st segment
800
900
1600
550
1700
1250
1350
1100
1500 - 10th segment

Kite flying for the kids at church. If it is too windy it won't work well. Trying to catch a slightly windy day and access to kids will be a very hit and miss. So, on a non windy day, I know from my younger years that the air flow and movement of air is above the ground. If you can run with the kite string until you get the kite high enough it will progress higher.
So on a non windy day how many feet high would the kite need to be before the air flow takes the kite to higher levels. I once had a kite so high you could barely see it with the naked eye.

We have an Igloo cooler and dispute over the size. The interior measurements are 34 inches long, 11 inches deep, 14 inches wide. We need that calculated to quarts.

Hey Experts!  Fully admit that I am working on something that is slightly outside my realm but I'm very interested in learning how to make this work so your help is greatly appreciated.

For software being developed, I'm trying to build a formula to calculate the success of an event (build a wooden crate) based on factors like character's smarts (+10% increase in success), speed (+5% increase in success) and ability (+15% increase in success).  

I've been looking all over the internet for how to build this equation or how to determine success/failure.  I've written formulas for Excel but not something like this so I appreciate your help and time.

Any idea how find the partial fraction decomposition ?

Thx
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So I must disclaim that I know that this is not an idea solution, however wanted to get some science and technical terms correct for running two networks off one NIC card as a work around to having VLAN and/or second router.  Again, this is NOT how I would do things, but for some home user wanting to run lets say a network off of another network for testing that it can be done this way because of how layer 2 works.  The layer 2 part is what I am most interested in, but wanted to get some expert opinions and why it works.

So a home user has a PC that is hooked into a dumb switch.  The dumb switch then goes to a normal home router, however one port goes to a switch to a garage for instance.  The home network is 192.168.1.0 and the garage is 10.10.10.0 that runs some devices that do not need internet.  Just needs to be able to send and receive data, and those devices might have another device down the line like a switch with more devices.  Now I know that you can set the NIC card on the computer to be the main IPv4 of 192.168.1.10 255.255.255.0 192.168.1.1 8.8.8.8 etc on the main page and on the advanced tab you can add a secondary IP of 10.10.10.10 255.255.255.0 no gateway and it will route the traffic to that network with zero issues and normal LAN traffic will go out the other direction.

I guess call it a proof of concept, but it allows this happen because it is only doing layer 2 and switched go off of MAC addresses so that traffic will never hit the router for this …

I have a cash projection model in Excel.
I have around 10 years of monthly data.
There are around 10 sources of cash and around 10 uses of cash.
I have determined the type of distribution which best fits each of the 20 series.
I have calculated the pertinent statistical parameters of each of the 20 series (e.g. mean or mode, standard deviation, etc.)
I have fitted the selected distributions with their respective parameters.
Some of the series have a normal distribution around a relatively high mean value.
Some of the series have a more Rayleigh or Weibull distribution - always positive but not symmetrical.

The purpose of the model is to predict the cash position over each of the next 12 months.
In some cases, a series has a growth factor to be included.

Each month, for each series, the current actual value is appended resulting in a new series of actual values.

Then an expected value is calculated for each of the next 12 months.

The question is:
Given a random series with known distribution parameters, what is a good way of generating expected value predictions?

In some cases, it appears that the best prediction is the current value.
However, if there's an outlier in the current value, this doesn't work well.

I need to use compression to change bit depth of a video signal.  

Our Focal Plane Array(FPA) is Vanadium Oxide(VOx) Resistive Microbolometers Uncooled Thermal Infrared Detector.  The output of this image sensor is 14-bit, Wide Dynamic Range(WDR), raw, monochrome, 640 x 480 resolution.  The pixels of this video signal will be processed by Image Signal Processor(ISP).  ISP input is 12-bits.  Therefore, I need to compress FPA output to 12 bits and then input into ISP.

How to perform global tone mapping using two methods, PWL and LUT (curve defined by lut) based mapping.  I need to tone map 14 bit data to 12 bit.  What does PWL stand for?  Please provide sufficient information so I can achieve this.  It's suppose to be similar to gamma compression.  I can do gamma correction in matlab.  Can this tone mapping also be done in matlab?  If yes, please provide some examples.

Please explain Gamma Compression algorithms. How to write Gamma Compression algorithms for typical video and image processing system?  Please provide some detailed examples.  How to gain sufficient understanding to be able to write Gamma Compression in 'C' or MATLAB?

There are 39 numbered ping pong balls. The people who control the handling of the balls have a very complex way of making the draws 100% random.
The cash rewards are for 2-3-4 or 5 numbers.

The chances of one of our 5 numbers drawn in the first draw is 5 in 39 or 12.82% = ?
Then the chances of one of our other 4 numbers being drawn in round two would be 4/38 = 10.52% = ?

Their site says the chances for match 2 is 9.2%
3 = 1 in 95
4 = 1 in 3042
5 = 1 in 501.942

If four of our numbers have been drawn there are only 35 numbers left to be drawn. Why isn't the chance on the 5th number 1/35?

How do I go about this?

5 liters but they come in 4 packages --> $11.95 - $2.49 to give me 4 packages out of 5 .. not sure if I'm on the right track