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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Early symptom of pregnancy: Headache - migraine headaches

Headaches as a precursor to pregnancy.

Headaches can represent the first sign of pregnancy and appear against the background. Hormonal changes that the body undergoes upon becoming pregnant.

After egg fertilization and pregnancy, changes occur in hormone levels estrogen and progesterone. Which can affect blood flow to the brain and cause headache.

Many women find that early pregnancy is accompanied by early symptoms, which they suspected existed. 

The problem is that these symptoms are discovered only after the fact, when the woman discovers that she is pregnant and analyzes the onset of symptoms.

A headache as a sign of pregnancy does not have to appear during pregnancy or as a precursor, and in fact all other preliminary symptoms vary from woman to woman and from pregnancy to pregnancy. 



Are headaches a sign of pregnancy?

Even before the blood or urine test, when the woman is sexually active and does not take or use any contraception, and when the headaches are added to other symptoms, the most important of which is delayed menstruation.

Headaches may appear as part of the hormonal changes that the woman experiences. In some cases, headaches can also be caused by anxiety and fear accompanying the feeling of pregnancy. 


Even women who have planned pregnancy and are beginning to 'feel' it experience confusion and anxiety when pregnancy takes shape. Because symptom-like headache are not specific, and may indicate a number of other events or illnesses, the recommendation is to consult a doctor or do follow-up tests to confirm the existence of the pregnancy.

Headaches may be caused by a significant hormonal changes occurring at the beginning of pregnancy, an increase in progesterone and estrogen levels. 

The hormone secretion increases to prepare the uterus for fertilizing the fertilized egg and predicting pregnancy. However, headaches may also include other factors such as dehydration, hypertension or low blood pressure, or eye problems.

Some of the factors are related to pregnancy and some are unrelated. If there are hormonal changes, it is likely that the woman will also feel changes in mood. 


However, the suspicion of gestation will become apparent when other symptoms appear beyond the headaches, such as breast tenderness, change in the color of the nipples, fatigue and nausea.

Many times, the headaches in some women are a sign of menstruation. So when the headache increases in these women, without evidence of menstruation, there is reason to suspect that this is a precursor to pregnancy. 

Headaches are characterized by a very strong intensity, which does not change as a result of rest or activity. It is estimated that women who have suffered from migraines before pregnancy do not experience headaches as a precursor or a phenomenon that accompanies pregnancy. 

However, sometimes their sensitivity and awareness of headaches, which they suffer frequently, make them think that this is also a preliminary sign.

Early symptoms.

Usually, when it comes to early symptoms, prenatal symptoms are specific and individual and vary from woman to woman, and from pregnancy to pregnancy. 

Thus, women who have felt a headache during their first pregnancy are not obliged to feel a headache or similar symptoms in their subsequent pregnancies. 

This headache can not also determine the health of the pregnancy, or the stage at which it is found.

When headaches accompanied by other symptoms, the simplest test for pregnancy is a home-based test, which is done through a non-prescription pregnancy kit. 


Additional tests that can reveal pregnancy are a simple blood test or a urine test.

It is not advisable to wait for a symptom such as a headache to perform the test or to rely on the headache as an indication or confirmation of pregnancy.

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