BASIC SAFETY RELAY

   Relay is the key to the survival of the continuity of an electrical power system security because it can eliminate the interference before it caused extensive damage. safety relay consists of three basic elements :

1.       Sensor Element

2.       Comparative element

3.       Control element

   Sensor element is a component that reacts in the event of changes in current or voltage changes and other parameters in the circuit is secured.
  Comparative element is the component in charge of comparing the reference current with changes in voltage or current or other parameters on the observed
  Control element is a component that serves to give the command to switch the switch or an alarm when there is disorder or condition that deviates from the normal state.

         

       Parts of the relay can be determined by two ways, namely:

     by viewing the content in the relay
     by using a multimeter (Ohm)


     How to know the relay is still functioning or not can be done by providing the appropriate voltage to the relay is in the coil. If the ignition is still working NC -> NO or NO -> NC, it can be said that the relay is still in good condition.

 danasumantri_039

Way to the truth

 

Everyone is always looking and trying to find the truth in this life, whether of truth in religion, truth in science, truth in relationships with others, and truth in the work. Therefore, each person taking the way and go their own ways to arrive at the truth. Most people use their life experiences or feelings or testimony from anyone else (especially certain authorities), even the combination of the three ways to arrive at the truth that she missed. Such means could have been helping people to find the truth, but only limited to relationships with others or on the job. However, the ways it was certainly not necessarily be applied as if experienced by someone else. Moreover, such methods are not reliable at all if people want to find the truth in all things in this life.

   History has witnessed and noted how the vast majority of people have been wrong about so many things. One of the spirits (hantu, tuyul, gendoruwo, kuntilanak, kolong Wewe, pocong, etc.). One of the drugs. One on health. One of nature. One of the political theory. Wrong about the economy. One of psychology. One of the opposite sex. One of the universe. Even one of the history. Most people have misunderstood most of the things happening around him, including his own life.

      Experience of one's personal life also can not be used as a tool (benchmarks) to find and understand the truth. Many people have the same experience about a particular thing, but they give the impression of each other and different responses. One's experience and a lot more talking in the context of the history, beliefs, feelings, and point of view of the person rather than talking about the truth that "occur in a wider context", ie the world.

 

 By : Danasumantri_7310040039

"goa tetes" in my village

At the time of the holiday season come a lote of ads on television that offer lots of entertainment amusement very interesting, especially in tourist area. In this my story I wil tell about the tourist areas,where the area is formed by natural processes naturally without any interference from humans. The tourist area is located in the place that is famous  with producing fruit “ salak ”. this place was named pronojiwo, and for tourist place we can call “ goa tetes”.

process formation  of the cove was formed from drops of water that contains calcium that many years to settle and overtime will form a stone stalagtite and stalagmite. Of the stone that makes this cave looks beautiffuls.

On holidays, many visitors arrive at this place,when visitors arrive at the location of the cave, they must walk on the way down along 3 Km to the mouth of the cave, with a fairly challenging track but fun. With ticket prices are so cheap we can enjoy the nature beauty “ goa tetes”.

by: Stevanus adi wardoyo

..:: Practice Make Water Rocket ::..

Name : Ade Yannis Yudiendrayana
NRP : 7310040032

      Hello my friends,, I Will to tell you about my experience when I and my friends practice make a water rocket in senior high school. In Beside is my group to make the water rocket,  this is a practice from physics course, the water roket is so simple.   

   We make the rocket from the bottle of drinking, and we make a design from the bottle until like a rocket. We make a wing from the bottle so that the bottle can be stand up. After  that in cover of the bottle we use  a slipper to be a slip from the bottle and then we put into water to the bottle. 

The water is half from the bottle because the bottle must have the air  so that can push the water  to under until the rocket fly like this photo. 

We make a pump of  motorcycle to push the rocket from under. The rocket achieve the high until suppose 3 meters in air.

Oke I think This my Third posting in this blog, Thank you..

Sinusoidal Wave Founder

For engineer like us, sinusoidal wave is very important and not strange for daily activity. Sinus is comparison of the triangle in front of  the angle with the hypotenuse. This wave found by Middle East muslim scientist named Abu Nasr Mansur on 11th century.

mathematician Abu Nasr Mansur was named ibn Ali ibn Iraq or familiarly called Abu NasrMansur (960 AD - 1036 AD). Bill Scheppler in his work entitled al-Biruni: MasterAstronomer and Muslim Scholar of the Eleventh Century, revealed that Abu Nasr Mansurwas a Persian Muslim mathematician.

"He was known as the discovery of the sine law," said Scheppler. Mathematical historian John Joseph O'Connor and Edmund Frederick Robertson explained that Abu NasrMansur was born in the area of ​​Gilan, Persia in 960 AD It was recorded in the Regions of the World, a geography book Persia in 982 AD

Abu Nasr Mansur was an important contribution in the scientific world. Most of AbuNasr's work focused on the areas of math, but some of his writings also discuss theproblems of astronomy.

In mathematics, he has so much work that is very important in trigonometry. Abu Nasrhas developed the works of mathematics, astronomy, geography and astrology Romannamed Claudius Ptolemy (90 BC - 168 BC).

He also studied the works of the Greek mathematician and astronomer, Menelaus ofAlexandria (70 BC - 140 BC). Abu Nasr criticize and develop theories and laws that have been developed that Greek scientists.

Collaboration with the Abu Nasr al-Biruni was so famous. Abu Nasr successfully completed some 25 works great with al-Biruni. "About 17 of his work until nowremained. This suggests that Abu Nasr Mansur was an astronomer and mathematician extraordinary, "said historian John Joseph O'Connor Mathematics and Edmund Frederick Robertson

In Mathematics, Abu Nasr has seven works, while the rest are in the field of astronomy.All of the surviving works have been published, has been translated into European languages​​, and this gives some indication of how highly the importance of the work of Muslim scientists.
In particular, Abu Nasr presents about 20 works to his student al-Biruni. One of the masterpieces of Muslim scientists is a commentary in The Spherics of Menelaus.