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Thursday, 14 October 2021

 HYDROELECTRIC POWER

Dams are what people most associate when it comes to hydroelectric power. Water flows through the dam’s turbines to produce electricity, known as pumped-storage hydropower. Run-of-river hydropower uses a channel to funnel water through rather than powering it through a dam.

Benefits

Hydroelectric power is very versatile and can be generated using both large scale projects, like the Hoover Dam, and small scale projects like underwater turbines and lower dams on small rivers and streams. Hydroelectric power does not generate pollution, and therefore is a much more environmentally-friendly energy option for our environment.

Current Limitations

Most U.S. hydroelectricity facilities use more energy than they are able to produce for consumption. The storage systems may need to use fossil fuel to pump water.[3]  Although hydroelectric power does not pollute the air, it disrupts waterways and negatively affects the animals that live in them, changing water levels, currents, and migration paths for many fish and other freshwater ecosystems.


How Hydroelectric Work


Parts of a Hydroelectric Plant

Most conventional hydroelectric plants include four major components (see graphic below):

  1. Dam. Raises the water level of the river to create falling water. Also controls the flow of water. The reservoir that is formed is, in effect, stored energy.
  2. Turbine. The force of falling water pushing against the turbine's blades causes the turbine to spin. A water turbine is much like a windmill, except the energy is provided by falling water instead of wind. The turbine converts the kinetic energy of falling water into mechanical energy.
  3. Generator. Connected to the turbine by shafts and possibly gears so when the turbine spins it causes the generator to spin also. Converts the mechanical energy from the turbine into electric energy. Generators in hydropower plants work just like the generators in other types of power plants.
  4. Transmission lines. Conduct electricity from the hydropower plant to homes and business.

Now all we need to do is a little mathematics. Engineers have found that we can calculate the power of a dam using the following formula:

Power = (Height of Dam) x (River Flow) x (Efficiency) / 11.8

PowerThe electric power in kilowatts (one kilowatt equals 1,000 watts).
Height of DamThe distance the water falls measured in feet.
River FlowThe amount of water flowing in the river measured in cubic feet per second.
EfficiencyHow well the turbine and generator convert the power of falling water into electric power. For older, poorly maintained hydroplants this might be 60% (0.60) while for newer, well operated plants this might be as high as 90% (0.90).
11.8Converts units of feet and seconds into kilowatts.

For the dam in our area, lets say we buy a turbine and generator with an efficiency of 80%.

Then the power for our dam will be:

Power = (10 feet) x (500 cubic feet per second) x (0.80) / 11.8 = 339 kilowatts

To get an idea what 339 kilowatts means, let's see how much electric energy we can make in a year.

Since electric energy is normally measured in kilowatt-hours, we multiply the power from our dam by the number of hours in a year.

Electric Energy = (339 kilowatts) x (24 hours per day) x (365 days per year) = 2,969,000 kilowatt hours.

The average annual residential energy use in the U.S. is about 3,000 kilowatt-hours for each person. So we can figure out how many people our dam could serve by dividing the annual energy production by 3,000.

People Served = 2,969,000 kilowatts-hours / 3,000 kilowatt-hours per person) = 990 people.





Sunday, 28 February 2021

 How To Study Optimally During a Pandemic




    During the COVID-19 pandemic, in accordance with government recommendations, the ministry of health and the ministry of education, all educational institutions are encouraged to carry out online learning a.k.a School From Home. So, I have been upload a video that will give u tips and trick how to study optimally during a pandemic.




Hope you can follow it and feel the benefits from it.

Monday, 26 October 2020

Recommendation for Maximilian Sulistiyo

October 26, 2020




Letter of Recommendation for a Job Position

October 26, 2020

Muhammad Derbyanoe Lexa Justicio
CEO of KARA
Dago street no. 36, Bandung

Dear Mr. Budi Sulistiyo,
It is my pleasure to recommend Maximilian Sulistiyo for a position as a Software Engineer at Google.
Let me introduce myself. My name is Muhammad Derbyanoe Lexa Justicio, the CEO of KARA, It's been 10 years since I started this company, and surrounded by highly skilled workers. Maximilian is one of them. He is the man who has uniquely stands out.

During the 10 years, I've worked with him, Maximilian showed great talent in programming, his codes and programs always worked flawlessly. When we first met, I was impressed with him and the programming skills. He is the kind of person with talk less, do more. 

My first experience with Maximilian's adaptability came not long after he was hired. Once, Maximilian showed his talent, and I saw it with my own eyes. He manages to save our servers in less than 15 minutes from a dangerous cyber attack. 

It's not just his programming skills that impress me, however, Maximilian was easy to work with because of his good attitude, kind, and diligent person. It makes me feel good to work with him. He is good at TWTB (Team Work Team Building).

If you need more information about Maximilian Sulistiyo, you can contact me at derbylexa89@gmail.com. This recommendation letter only shows a glimpse of his skills and achievements. I would be happy to further elaborate on my time working with him.

Sincerely,

Muhammad Derbyanoe Lexa Justicio
CEO of KARA


.

Monday, 19 October 2020

My Goal, My Ambition



Dreams and real life are two sides of human life. That said, many things that happen in the real world start from dreams.

    Every human being has the confidence and ability to realize the dreams he/she has planned since long ago. People's dreams develop along with the needs and realities they face. He realized that with his persistence in that goal could produce the dreams he wanted. It doesn't matter how big or small our dreams are, everything is determined by the strength of desire. Humans living in this world must have a purpose. Humans who do not have it all will be confused about living their lives.

    Dreams for me have the meaning of someone's hope for their future, dreams have different meanings for everyone, many think dreams are dreams that are very difficult to achieve, in fact this is not entirely true, because a dream can definitely be achieved if we try seriously- really in order to be achieved. There are those who think dreams are just dreams, but there are also people who think that as their life goals, having dreams can give them the enthusiasm to continue to move forward to carry out this life so that it can become self-development. However, we certainly agree that reaching for the dream of a coveted future is not as easy as snapping fingers. Many obstacles must be overcome.

Then, what is my dream?




    My name is Muhammad Derbyanoe Lexa Justicio. My doubts about physics and mathematics have grown since I was a child. I spent a lot of my childhood studying a fair amount of science. Also, when I was a child, I liked to read biographies of famous figures. From scientists to well-known figures such as historians, presidents and many more, I like to read them.

    I don't know why, but when I was studying mathematics and physics, my head which slowly turned a little dizzy and eyes that heated up due to forgetfulness gave me a special pleasure. Some people consider it all torture, but not for me. It's all a gift. Gift can learn and enjoy certain effects while you studying something.



    I've always dreamed of becoming a great person, greater than the third President of Indonesia, BJ Habibie. That's no prolem, right? I want to become an engineer and advance Indonesia, my country, in the field of technology. But just like other children, I also often have different ideals, sometimes I want to become a doctor, an architect, even a police officer. But as time went by, I was able to determine what I should do in my future.



    Now I am in high school. The high school where I studied is one of the best schools in Indonesia. With each passing day, my desire to make my dreams become stronger.



    After high school, I wanted to study at the Bandung Institute of Technology or find a scholarship to study abroad. While I'm in college, I also want to build a business with my friends so that my life doesn't depend solely on my parents.

   


     I want to go to school as high as possible, and become an engineer. Not only an engineer, a professor. I want to become a minister for State-Owned Enterprises (BUMN), like Eric Thohir. I really want to fix the State-Owned Enterprises in Indonesia.



   When my dream has come true, I want to be able to help other people realize their dreams. When I am successful enough, I really want to be able to send orphans to school. I often feel sorry for the orphans. I want to become a regular donor to an orphanage / foundation, or even establish a foundation,

    I will try to achieve all of my dreams and make them come true. When all my dreams come true, I will dedicate them all to the happiness of my parents, because without them I would not be able to make it all happen.

Wednesday, 14 October 2020

NICOS WEG - REVIEW

REVIEW


 

Hi everyone, this time I will review Nicos Weg movie. Happy reading!


This movie is the first German language movie that I watched. It took a long time to understand this movie. This movie tells the story of a young man named Nico who goes on vacation to Germany. Nico from Spanish, so for him, Germany is still quite foreign. 

Honestly, this film is a film that is suitable to watch with family. This film makes it easier for us to learn German, especially for film lovers. Nico's story, maybe it can be an illustration when we go to Germany with quite a bit of language understanding. More or less, I have to open a dictionary in order to understand the meaning of this film. However, still, this film is really able to convey German language learning properly.

The story begins, when Niko went to Germany for a vacation to meet his aunt. While at the airport, Nico experienced something surprising and troublesome. Without realizing it, his bag disappeared. Nico, who was careless, was confused about how to get her bag back. Luckily, Niko got help from one of the German peoples. However, it turns out that finding Niko's bag is not as easy as it seems. Many things happened. For more details, friends can watch the film, Link below.

Nicos Weg

Maybe I will talk about the advantages and disadvantages of this film, before we get into the advantages and disadvantages, I just want to remind you that this is my only opinion. It could be, my taste in film is much different from the taste of your friends' films.

Advantages of Film

The advantages in this film are quite a lot, starting from the light plot, to the way of speaking the words which can be said to be easy to understand. What I should appreciate is how the director and scriptwriter put the value of the German language in this film. This is very rare, how can you include the material that must be conveyed in this film. I also appreciate how the players play their respective roles. Almost all actors and actresses play very beautifully. Especially the character Nico, really can be relied on to be the main character. Can become the best actor when he was confused, trying to joke with the small children around him, and how he reacted to the situation really felt very real. Of course, not everyone is capable of doing it. A few scenes are also enough to let us know the tricks of learning German. Sticking paper on an object, for example, it really did not occur to me. And it looks like I'll start doing it.


Disadvantages of Film

The flaws in this film are actually quite a few. I think the shortcomings of this film are the first, how to take pictures. You could say, the shooting in this film is not optimal. Mainly, to present a scene that seems and should be able to appear even more beautiful. Because in my opinion, there are a lot of scenes with less attractive backgrounds. Not a big promblem actually, however, enough to bother my mind for a moment. Second, some scenes show how to speak quite quickly. It's not that fast, however, for me who is just learning German, it is a bit of a hassle. The plot of this film feels a little boring, because in my opinion, this film is classified as having a very, very flat plot. There is no rhythm that can make the audience stare and on the contrary, there are a lot of algorithms that make the audience a little sleepy.


The words that still ring in my ears are "schön" somehow, even today, the word "schön" is still in my head. Difficult words? Obviously there is, but it can be overcome because I am always accompanied by my favorite dictionary.


Maybe that's all I can review this time, 

Thanks 

Monday, 27 July 2020

OFFER and SUGGESTIONS

Hi guys so today i want to give all of u the example of offers and suggestions dialogue. Enjoyy


Ilyas: Hello der, how are you ??
 Derby: Hello ilyas, I'm fine thank you
 Ilyas: What are you doing der ??
 Derby: Here I am planning about a cultural tour destination for 11th grade ...
 Ilyas: May I help you? 
 Derby: yes of course
 Ilyas: I think we should look for the internet what a good destination
 Derby: okay
 Azka is coming.
 Azka: Der what to do ??  Have you gotten a destination for Tur Budaya?? 
 Derby: This is again being discussed
 Azka: What about going to Bali?  Bali is good city with beautiful scenery
 Ilyas: yes, I would like to.
 Derby: Yes I agree
 Azka: what do you think about transportation to the Bali ??
 Derby: I suggest by plane so that the trip is fast
 Ilyas: what about the train ??  With the train there is time to be with friends while on a trip
 Azka: OK what if you board the plane and go home by train.
 Der: yes , you are right
 Ilyas: yes, I agree too

Wednesday, 29 April 2020

Proposal PKWU

Hai gais.. jadi kali ini aku mau post proposal PKWU
semoga bermanfaat !!!!!

Proposal