Gravity, squid, and Blindness: What Is It Like Living in Space?

By: Syaifuddin Iqbal on 20:14

The resilience of the human body's mission in the International Space Station for a year was launched on March 27 and involved 19 medical and biological testing, 14 of which are designed by the Russian Space Agency. Cosmonaut Mikhail Kornienko and NASA astronaut Scott Kelly will also perform two experiments together. Most of the tests will be used by scientists to assess the ability of the human body during space travel for the preparation of long-term missions to Mars.

Famine in Space Without Gravity

As indicated by several previous trials, conditions of weightlessness affects human eating habits. Food does not have weight in space, so the astronauts feel hungry more often compared to when they were on Earth. According to Boris Afonin, scientific supervisor of food testing, increased appetite combined with a low amount of physical activity sometimes creates weight gain space explorers.

Another impact is the weightless conditions astronauts experience a change in their sense of taste while in space. "It's not salty foods into sweet or sour," said Afonin. "But astronauts often realize that the food they like while undergoing test trials on Earth invisible food tasty again. Some of them complained they were not getting pleasure from eating while on a mission. The cause of it is still to be us to investigate."

However, upon returning home, astronauts can not immediately eat beefsteak or borsht (typical Russian beet soup), as suspected people. "They need to adapt in advance, because after completing a mission in outer space, Earth digesting food takes hard work," said Afonin. "The reason weightless conditions also suppress the activity of the human digestive system, or in other words the intestine loses its ability to push the food."

However, according Afonin, all of it is just common assumptions, and that he supervised trials will determine which part of the human digestive tract are the most affected, including if there is a risk of pathological changes. The data will be used to figure out how to avoid dangerous changes in the digestive system and devise an optimal diet for astronauts.

Blood Flow to the Top

Russian scientists involved in the mission will also monitor the body's metabolism Mikhail Kornienko. Every two months, the cosmonauts will fill out a questionnaire regarding the consumption of water and food, take blood samples, and the results are displayed in a special tool called "sprut" (squid in Russian).

Data is expected to help scientists see how weightlessness affects the immune system and the endocrine system of man. "Even small changes in the endocrine gland can affect the performance of astronauts," said Galina Vasilieva, chief researcher at the Institute of Biomedical Problems of the Russian Academy of Sciences.

In addition, the effect of zero-gravity conditions also have an impact on the redistribution of human body fluids and can lead to dehydration. "The condition of weightlessness makes a large amount of blood is redistributed to the upper body," said Vasilieva. "All organs, including the liver, have to work harder. To adapt this regard, the body tries to get rid of excess fluid. As a result, on the first day of the mission astronauts showed an increase in the amount of urine."

When astronauts return to Earth, it is the other way: gravity ambushed and blood tend to be driven to the bottom of the body, so the astronauts could hardly stand on their feet after landing. The trials were conducted by the Russian team will help facilitate and accelerate adaptation in good condition in space and on Earth.

Too Easy Breathing

Another test conducted dubbed "UdoD" (a kind of colored birds in Russia). The first test done when astronauts are in zero-gravity conditions. These trials study the impact of the redistribution of fluid in the respiratory system and vision. Increased blood flow to the upper body causing intracranial pressure. This can result in reduced vision capabilities, which have been reported by several astronauts. It also happens when astronauts stood upside down.

As part of the experiment, Mikhail Kornienko will breathe using a special tool that is designed to lower blood pressure in the chest cavity and pushes the blood back down, said one of the Russian scientist Alexander Suvorov. "In a zero-gravity conditions, weakened respiratory muscles, the same as the leg muscles, because there is easier to breathe," Suvorov said. "UdoD designed to make greater efforts cosmonauts do breathe in weightless conditions, working like a sports machine," he explained.

Source: RBTH Indonesia

Source: news.viva.co.id

Anna Kuchma

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Friday, March 27th, 1000 meter asteroid passed by Earth

By: Syaifuddin Iqbal on 23:08

The distance is about 11.6 times closer than the moon.

Iustrasi (Reuters/NASA/JPL-Caltech/Handout)

After passing the asteroid BL86, the earth will again meet with other asteroids. This time, the asteroid was named 2014-YB35.

Reported by Softpedia, Thursday, March 26, 2015, the asteroid will approach the Earth YG35 on Friday, March 27th, 2015. It is about 11.6 times closer than the moon.

In other words, 2014 YB35 will not give concern for the inhabitants of the earth. Distance YB35 with the earth is only about 4.5 million kilometers or about 2.8 million miles. You could say, to the size of the space, the distance is nearing. But scientists ensure this distance will not endanger the safety of the earth.

YB35 asteroid was first discovered on December 27, 2014 by astronomers working at the Catalina Sky. It is a project that examines and identifies comets and asteroids that could potentially threaten the Earth.

Since the discovery, space rock that has been observed many times, even in 380 occasions. Astronomers predict, the size range of 440 to 990 meters, or about 1,440 to 3,250 feet.

With the size of it, the speed of a space rock reached 10.6 kilometers per second, or about 6.6 miles per second.

This is the second time this year an asteroid nearly rammed earth. Earlier, in January, 2014-BL86 asteroid passing Earth at a distance of 1.2 million kilometers or approximately 750,000 miles from Earth.

Fortunately, even though the distance is close, BL86 also potentially hit the Earth. B86 also continued his journey in space.

After YB35 passing, his form will not be closer to the earth until later in 2033. The asteroid will come back to visit Earth in the year with the closest distance of 3.2 million kilometers, or about 2 million miles from Earth.

Source: viva.co.id

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Effective Ways to Learn Physics

By: Syaifuddin Iqbal on 13:05

Learning physics is fun. Many unique and interesting things found in physics. Natural phenomena associated with matter and energy are the main attraction when learning physics.

As a small example presented here is the phenomenon of the rainbow. Natural events are often associated with this superstition. It turns out that just the natural process of decomposition of sunlight by water particles.

Similarly, the symptoms of the lightning, echoes and reverberations on sound reflection events. Newton's laws of motion associated with objects and gravity of the earth. Of course there are many other unique and interesting events related to physics.

Studied physics at school, especially in junior high, also directly benefit siswa.Teori and simple physics concepts already learned, can be applied in the student's own environment. Facilitate students to do any work or activity. For example, a simple aircraft materials; working principle of levers, pulleys and inclined plane. Useful to facilitate people to do business or work.

However there is no doubt. Most students consider the physics as a subject difficult. Loaded with formula. Filled with a series of abstract events and often made dizzy students. It is a mistaken belief that has caused less interested students to learn.

Then, how to learn physics in order not to be too hard lesson for the students? Actually quite a lot of articles as tips to study physics. But there's nothing wrong we discussed back in the blog this educational article. Here will be presented how to effectively study the physics of matter matrapendidikan.com version:

1. Dispose of thought physics was difficult.

Students have to do first is to discard the idea that physics is difficult. Physics Is not it learn everything related to the phenomenon around the lives of students? Well, because it is close to the physical environment, students can certainly learn physics. Will understand and be familiar with the material. Able to also work on the physics exam questions.

2. Learn the basic material and easy.

Learn and master the basic material of the easiest first. Similarly, examples of problems and how to do it. The basic material will be related to the physics of matter further.

3. Read the material to be studied physics.

Get used to first read the subject matter to be learned in school. It became the capital for the student to receive the teacher's explanation. If the student has mastered 20% means that students already have the capital to improve the current understanding of the teacher explains lessons in school.

4. Note and record fine

Look carefully when the teacher explains the lesson. If the student has read the material that is being described by the previous teacher at home. Explanation teachers will easily connect with the minds of students.

If there are less understood immediately ask the teacher. Then immediately record the material that is considered important. Compare students' understanding and mastery. Is it increased after following the teacher's explanation?

5. Doing exercises.

Work issues easiest first. Then proceed with further problems. Read repeated statements of each exercises. Then make sure what is asked by the question. Typically, it exercises no keywords question. Know what is really being asked in the exercises. If you do not know the subject matter of the question, it is difficult to do.

6. Learning group at home.

Learning physics does not mean memorizing the subject matter of physics. But understanding the concepts and laws of physics are studied. Therefore, to enhance students' understanding more effectively with study groups at home. In this way would allow students to talk to each other, share and ask each other in the group.

7. Fix the logbook physics.

Note physics must complete and neat. The goal is that students feel at home opened and read a physics lesson record book. Just imagine, if the student might like to learn to read a book that records are incomplete and chaotic. Of course, the student will be lazy to read the book.

As an important note, the more often and at home doing physical exercises the sharper the ability of students. Thus an effective way of learning physics in junior high, hopefully useful.

Source: .matrapendidikan.com

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