Scientists introduced a device that creates holograms using ultrasound & polystyrene ball

Researchers at the University of Sussex in the UK have introduced technology that can create holograms using ultrasound and a 2mm polystyrene ball. They can move and interact with the observer.


Scientists called the new technology "multimodal acoustic trap display" (multimodal acoustic trap display, or MATD). Images are created between two horizontal plates on which many tiny ultrasound speakers are mounted. They create an inaudible sound field in which there is a "pocket" of low pressure, where a polystyrene ball enters. By moving the "pocket", you can move the ball, forming an image. Colors are added to the image using the projector.
Through careful monitoring of the ultrasound field, scientists can add sound effects and music to animated images. Vibrations can be adjusted to receive sound waves in the entire range of human hearing and, for example, to imitate clear speech. In addition, you can interact with images and even feel them in your own hands.



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How to help my overweight child lose weight | Childhood Obesity

How to help kids lose weight, Simple steps that can help parents deal with the complex situation. What are good diets for kids?



how to help my overweight child lose weight girl and cake
how to help my overweight child lose weight

How to help obese children

The excess weight usually has an effect on the child's health, as well as social and functional implications. 

It is difficult for parents to see the child's suffering, and they are debating what is right for him and whether the weight should be defined as a problem or is it the child's body structure.

A few simple steps may help parents cope with the complex situation successfully. 

What foods are healthy for children? mom and girl eat
What foods are healthy for children?


It is important for parents to understand that the real challenge is changing the lifestyle of the entire family, and not just the overweight child. 

Because lifestyle change, like other changes, may be challenging, we recommend choosing two to three goals to focus on. 

Goals that have high chances of success should be chosen, as any success you experience increases motivation to keep on changing.

Weighing children as a means of surveillance should be avoided as well as compliments or comments related to their body appearance. 

In addition, parents should avoid self-weighing with their children or comments about their appearance. 

Only the willpower of the children, their health and their progress in the change process must be considered. 

It is advisable not to radically avoid any food from the family menu. Remember that everything is allowed in small quantities, once every few weeks.

How can an obese child lose weight?


The foundation of every success is the belief in your child's abilities to make change.

Encourage and strengthen the child with every success, small or large.

Eat neat family meals in a pleasant atmosphere. It is important not to have it in front of the TV, computer or other screens. 

Family meals allow children to learn from parents to diversify the foods eaten, experience proper eating and enjoy quality family time.

It is important to make sure that the meals include some foods that the children love, and to which new foods and flavors will be added.

Many children are not attracted to different vegetables, so they should be given the vegetables they love and offer with them each time another new vegetable.

Use small plates and small dishes, this is a good way to get the right amount of food.

There is usually no need to limit the amount of fruit eaten by the children. The fruits provide available energy, in addition to vitamins and minerals that are essential for the body's normal activity, and also include dietary fiber that helps in proper metabolism. 

Breakfast is important for providing the energy needed to start daily activities, hormonal and perceptual functioning. The meal can be small, and even include only fruit, a glass of milk or soy milk. 

Breakfast may help regulate the following meals, and reduce the risk of obesity.

Drink only water. 

Leave the sweet drink to the occasional special occasions. Water is necessary for the proper functioning of the body, and our bodies do not always signal us in time for our fluid needs. 

It is important that all members of the family, especially the parents, make sure to drink water as an exclusive drink. Avoid a situation where one family member keeps himself a soft drink at home.

For dinner, we recommend offering children fresh fruit, fruit salad, fruit-based plush, whole-grain crackers with healthy spread, or whole-wheat flour muffin. 

In families where it is customary to eat sweets and snacks, it is advisable to limit their eating and offer children a weekly "candy bank" that will define the amount they can eat. 

Each child can be given a small, decorated box with enough candy for three days or a week, and the child will have to manage his own candy bank alone.

How Sports Can Help Childhood Obesity. kids playing sports
How Sports Can Help Childhood Obesity


How sports can help childhood obesity?

Sports are important to health and improve body metabolism. It is recommended to perform sports activities four times a week, at any age and in any physical condition, adjusting the activity to the ability. 

Since children prefer to do sports as part of family activities and play, it is worthwhile to find common and fun ideas such as hiding, jumping rope, soccer and dancing at home. 
  • The activity must be fun and not too difficult to encourage the child to persevere.

Many hours of computer games or watching TV increase the risk of obesity. 

Beyond the fact that children do not feel the amount of time they sit and sometimes eat in front of the screen, such a lifestyle creates behavioral conditions that will affect their lives as adults. 

Watching television also causes them to be exposed to advertisements that encourage eating unhealthy foods. It is therefore important to limit the screen time to two or three hours a day.

Questions and Answers on childhood obesity

  • My eight-year-old daughter keeps telling me she's hungry, and I don't know whether to let her eat every time or not. I'm also not sure if her weight is good for her age. How to deal?
Children sometimes tend to use the words "I'm hungry" to create an immediate response in the parents. 

Sometimes it's a real feeling of hunger, and sometimes it's their way of saying "I need something" without knowing exactly what they need. 

Such a child tells us that he is not satisfied. The parent should check with the child when they last ate and what the meal contained. If there is any doubt about the child's behavior and question marks regarding proper and appropriate nutrition, you should consult a pediatrician. 

A dietitian can conduct a nutritional and physical status assessment, and give guidance on how to understand and differentiate needs.

If she detects emotional needs that are not satisfied, she can refer to complementary emotional care.
  • My 15-year-old daughter began to reduce her range of foods, refusing to eat snacks, chocolate and sweets. Is she simply adjusting to healthy eating habits, or should I be worried?
When a teenage girl starts making this kind of choice in the foods she consumes, you should talk to her about it and understand the reasons. 

Does she want to lose weight? Is she being dragged after someone else doing this in the classroom / home? It must be checked whether it also reduces quantities of the basic foods (bread, meat, dairy products). 

Reducing high-fat and sugar-rich products from the daily menu should a red light bulb. 

Adolescence is a confusing age, and it is difficult to accept the changes in the body. Eating disorders are common at this age. Keep an eye out and, if necessary, consult a specialist dietitian to treat teens. The dietitian will perform a nutritional assessment and provide guidance and opinions.

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