Приложения разработчика Flavio Cobucci в Android Market

Diesel density to 20 oC (v. 4.0)

Flavio Cobucci опубликовал приложение 2012-07-10
(обновлено 2012-07-10)

This application is a tool that quickly converts the density of diesel oil to 20 degrees.  It is for gas stations and all who work with Diesel oil.

It is well known that diesel is sold by distributors and is consumed at any temperature. Converting the density of diesel oil to 20 degrees is an important and practical way to prevent fraud.

However this conversion requires extensive spreadsheets and various calculations.

This application makes the conversion quick and easy.

Like almost all substances, Diesel oil suffers volume change with temperature change and, therefore, a truck loaded 10,000 liters at 28C from the distributor will have less volume at destination at 18C, for example.

Knowing how much  reduction there is in the volume (or increase) is the objective of this application.

The initial data are density and temperature when the  Diesel leaves the distributor (shown in the invoice of the product) and the density and temperature when it arrives at the destination (which should be measured).

The application will convert to 20°C the density of the product from the distibutor (invoice) and will also convert to 20°C the density at the destination.

Importantly, the application is valid for diesel fuel in a density range from 0.810 to 0.889 and a temperature range from 12 to 38 degrees Celsius.

Interest Rate Calculator (v. 5.0)

Flavio Cobucci опубликовал приложение 2012-07-08
(обновлено 2012-07-08)

This application allows you to calculate the values ​​of a loan, including interest rate.

It is always difficult to verify the effective interest rate, because the calculation requires mastery of financial calculator.

For example, funding of $ 10,000 in 10 installments of $ 1,100 generates a total of $ 11,000 and an interest "apparent" of $ 1,000 or 10%. But the payments are monthly and so the calculation can not be done this way.

Interest in the above example would be 10% if $ 11,000 were paid in full at the end of 10 months. But we pay monthly. So the Annual equivalent Rate of this example is about 24%!

This application will quickly calculate the interest rate and will also allow the calculation of other factors, if the interest rate is already known.

The calculation of the interest rate is always done by approximation, and in this application, we use the Newton-Raphson method. Therefore, depending on the inputed values​​, the calculation may take a few seconds.

Lubricants Viscosity Calc (v. 5.0)

Flavio Cobucci опубликовал приложение 2012-06-09
(обновлено 2014-05-05)

This app is for those who work with lubricants.

There are four formulas:
* calculating the viscosity index (having the information of viscosity at 40 and 100 degrees Celsius);
* calculation of the viscosity at 100 degrees Celsus (having the information of the viscosity at 40 and Viscosity Index);
* calculation of the viscosity at any temperature (taking information from two temperatures and two viscosities);
* calculation of the blending of two oils to achieve the desired viscosity.

Mineral oils are Newtonian fluids, but in some cases, especially because some additives -like the one that increases the viscosity index, they do not behave as such fluids . For this reason the formulas of this application can generate inaccurate values​​. Thus, the results are more accurate for viscosity ranges between 5 and 1000 cSt, viscosity index between 60 and 180, and temperatures between -10 and 150 degrees Celsius.
But, in any situation, the results of this formulas should only serve as a reference and they will never replace the manuals and Descriptive brochures of each product.

Cylindrical Tank Volume (v. 13.11.8)

Flavio Cobucci опубликовал приложение 2012-06-08
(обновлено 2012-06-08)

Easily calculate the volume in a horizontal cylindrical tank. With data on length and diameter of the tank and liquid height, the formula returns the corresponding volume.