## Null Hypothesis

Null hypothesis is effectively stating the default situation. It is as you said there is nothing going on. When some one puts forward a claim the null hypothesis is that this claim is not true and needs to be proven. When we are testing between a new claim and the null hypothesis, a null hypothesis… Continue reading Null Hypothesis

## Islamic Crescent

Moslems Must Observe the apparent movement of the sun across the sky in order to performs prayers. There is no consensus on the times of the prayers among different Moslem factions and developing an algorithm was affected by this fact. For example, Sun depression angle considered to calculate Fajr and Isha prayers are not agreed… Continue reading Islamic Crescent

## Directions On Map

The direction between any two places on Earth can be calculated using the spherical trigonometry. We can use the following equation to do that Direction Angle =tan-1 (sin(longitude2 – longitude1)/cos(latitude1)*tan(latitude2)-sin(latitude1)*cos(longitude2-longitude1)) In spherical trigonometry values of latitude and longitude represent angles as in the following diagram: Example One famous example is The Islamic Qibla. Muslims need… Continue reading Directions On Map

## Calculating Sun Declination

Declination of the sun is the angle between the equator and a line drawn from Earth to Sun center to center. The declination angle varies seasonally due to 2 factors — the tilt of the Earth on its axis and its rotation around the sun. If the Earth were not tilted on its axis of… Continue reading Calculating Sun Declination

Find Your Way is a navigation app for android. It is made mainly for travelers. With it you can go back easily to your hotel. you can go out and walk without worrying about losing your way. First , set your home point, which is the point you want to start from and go back… Continue reading Find Your Way App

## Calculate Sunlight Hours

The duration of sunlight follows a simple harmonic motion. It is periodic and repeats every year. In the Northern Hemisphere, the longest day is June 21, and the shortest is December 21. The averagelength of daylight is 12 h, and the variation from this average depends on the latitude. (Forexample, Fairbanks, Alaska, experiences more than… Continue reading Calculate Sunlight Hours

## Julain Day Calculation

How To Calculate the Julian Day These are the steps: let a = (10000.0 * year) + (100.0 * (month)) + day;            note: a should be > -47120101 If month <= 2 then add 12 to month to become 13 or 14 and substract 1 from year             let b1 = Floor(year / 400)… Continue reading Julain Day Calculation

## Convert your website to an android app

Many people like to convert their websites to mobile apps. The programmers charge a lot for that , ranging from 100 USD to 500 USD per year. In addition to that they insist on having a plugin in the website. If your website have a mobile version then we can help you with a cheaper… Continue reading Convert your website to an android app

## Sun Calc

The Movement of earth and planets around the sun can be calculated quite well. This is a web app which enables you to know the times of sunrise, sunset and other values . It is possible for your location or any other location on earth you like. Just make sure to enter correct values of… Continue reading Sun Calc

## Prayer Times And Qibla

This App is designed to enable people to get Islamic prayers schedule from any place on earth and at any time of the year. Here the web app: Islamic Prayers ðŸ•‹ Islamic Prayers Times Day Month Year Hour Minute Second TimeZone Latitude Longitude Prayer Time Notes Fajr If values are not valid ,use astronomical twilight… Continue reading Prayer Times And Qibla