Hey, I totally understand that you need to control your body cycle to stay active all the day. It cannot happen immediately but if you try the following things, it will gradually lead to less sleep:1. Exercise. If you're feeling sleepy, some brief exercise can help wake you up. Physical activity increases blood flow to all parts of the body, resulting in you feeling more energized overall.[1] Studies show that you are more productive after exercise.2. Try caffeine. A cup of coffee in the morning or mid-afternoon is a go-to for many for a reasons. Caffeine is a powerful stimulant that can wake you up and help you stay alert throughout the day.3. Eat energy rich foods during lunch. If you're feeling fatigued, it's best to skip a heavy lunch and instead eat a small meal packed with energy-rich foods.4. Practice mini meditation. Engaging in brief periods of meditation can help you re-energize during the day by momentarily relaxing your mind and body.

Put a bucket of water near you ..when u feel sleepy put your legs in bucket..it works try it..

Don't study only one topic or subject continuously. ..........change your study subject after every 2 hours. .......... if your mind becomes tired you feel sleeping