CEPOT IN THE AIRPORT

Saudara-saudara sekalian, ada yang pernah memainkan cepot? Sudah lihaikah? Selamat deh untuk kalian yang sudah mengerti dan biasa memainkannya.

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Wayang asli Indonesia yang satu itu pernah membuat saya terkesan. Bukan karena warna mukanya yang merah, tetapi karena cara memainkannya. Begini ceritanya, jeng jeng jeng… Dahulu kala, pada suatu hari, ada sebuah… *eh bukan! Saat itu, saya sedang iseng selesai check-in di bandara Soekarno-Hatta. Karena bosan, saya mencari sesuatu yang bisa dimainkan. Saya sempat terpikir untuk bermain seluncuran di lantai bandara itu, tetapi yaaaaa malu dan mengganggu ketertiban. *cieeee sok tertib. Dari kejauhan, sepertinya ada teman saya yang sedang memainkan boneka. Saya langsung mengira itu semacam barbie. Dengan gesit, aku langsung meminjamnya. Pas sudah di tangan, “loh, kok?”. Tik tok tik tok. *loading… “Wah, ini sih bukan boneka, Kayaknya wayang deh”. Berhubung telanjur penasaran, yaaa aku mainkan saja. Kapan lagi memainkan si cepot yang waktu itu kata teman-teman sih wayang dari Jawa. Hehehheeeee.

Waktu lagi coba-coba memainkan, jadi bingung sendiri. Mana depan mana belakang? Mana yang unutk membuka mulutnya mana yang untuk menggerakkan tangan-kaki? Serasa gapot deh. Gagal cepot!!! Sewaktu saya sudah mulai mengerti cara memainkannya, tiba-tiba teman saya yang lain tertawa. Saya heran dong. Waktu menoleh ke belakang, tidak ada apa-apa *ah, sinetron. Ya sudah, saya mainkan lagi saja cepotnya. Tentu, dengan gaya amatir agak sok keren.

Setiba di tempat tujuan (baca: kampung halaman), saya tonton videonya, wuahahahaaaaaaa. Ternyata, ada orang yang tidak sengaja lewat dan menyaksikan pertunjukan wayang saya di bandara tadi. Mungkin dia heran dengan cepot yang saya mainkan. Rasanya saya ingin berbisik dengan orang itu, “Maklum, Pak. Saya masih amatiran. Ampun kalu mainnya kacau.” Jujur, malu sih, tetapi bangga. Bisa memainkan si cepot di depan warga negara lain *walau tidak sengaja alias kebetulan. Suka cepot, suka Indonesia 🙂 Bagi yang mau melihat videonya, bisa klik di sini: http://www.youtube.com/watch?v=grvy8Nc8JTc&feature=youtu.be.

Kupasan Opini Belajar-Mengajar Fisika

Kupasan Opini Belajar-Mengajar Fisika

Untu k kamu yang lagi belajar Fisika ataupun yang mau dan akan mengajarkan Fisika, boleh nih jadi bahan pemikiran kita bersama. Walau tidak terlalu memikirkannya, setidaknya untuk bahan renungan saja lah. Oke?

Physics and Sport

How does physics help sport?

Physics is not only relevant to the “big questions” of where the universe came from and how it works – it has many real-life applications too.

Sport is just one of them, and, with the Games coming to London for July–September, physics is behind much of the summer’s action.

Right on time
Physics is used for precision timing of runners’ movements – from starting block to finishing line.

Modern starting blocks are integrated with a high-tech starting gun system – if its pressure sensors detect that an athlete has lifted his or her feet sooner than human beings can physically react – 0.1 seconds – they’re automatically pulled up for a false start.

At the other end of the track, the days of photo-finishes and closely examining which runner is a nose ahead at the finish line are long gone. Instead, RFID tags – similar to those used in retail stores’ security tags, but much more precise – are used to definitively tell which athlete crosses a line first, and how quickly. Some transponders are attached to runners’ shoes, others are stuck to their race number – the latter are thought to be more accurate as they detect when the torso, rather than a foot, crosses the finishing line.

Using the force
To excel at any sport, mere athleticism is not enough, and competitors need to develop good technique to run, swim or row faster than their opponents.

In rowing, hi-tech paddles are fitted with pressure sensors that are used to work out the forces on each part of the oar at different points during a stroke. Athletes can then review a graph of the force at different times during their training session with their coach,. This enables them to determine which aspects of their technique need to be worked on in order to give them the best chance of getting on the winners’ podium.

Material world
Runners, cyclists and swimmers experience a force pushing them in the opposite direction to which they’re travelling, caused by resistance of the air or water through which they’re moving.

Improvements in technique such as cyclists changing position can minimise this force by reducing cross-sectional area (to which it is proportional). Cyclists hugging their bodies tightly to the bike’s frame can reduce drag force by half. But careful design of materials can also make more fluid flow around an athlete’s body, rather than pushing against it.

Around 2009, swimmers began using full-body swimsuits with polyurethane panels. The tight suits squeezed swimmers into a smaller cross-sectional area as well as eliminating skin friction, allowing water to flow over the body more easily. Their introduction coincided with a spate of world records being broken.

Health and safety
Physics-based methods such as ultrasound are routinely used by physiotherapists to assist them in healing and monitoring sportspeople’s injuries.

High-frequency sound waves are used to create an image of, for example, a footballer’s knee. Because different tissues reflect those waves back at different intensities, physiotherapists can tell what type and depth of tissue they’re looking at.

They’re used diagnostically for problems such as fluid on the knee, or to spot tiny tears in tendons before they become major problems – preventing athletes having to suffer a long layoff while they recover.

A leg up
Prosthetic limbs have come a long way from the wooden legs associated with 16th-century pirates. While they were rigid crutches, modern prostheses are designed to emulate real limbs by storing and then releasing energy.

The rigidity of the carbon-fibre prostheses used by Oscar Pistorius, the best-known amputee runner, changes depending on where forces are applied – they remain stiff towards the knees but the parts that contact the ground are springy.

In fact, they’re so good that Pistorius was deemed by the International Association of Athletics Federations to have an unfair advantage over able-bodied runners until the decision was overturned by the International Court of Arbitration in Sport in 2008.

source : http://www.physics.org/article-questions.asp?id=104

Physics in Choose

Why should I choose physics?

 

Do you want to investigate the limits of space, the beginning of time and everything in between?

How about understanding how the technology around you works? Want to save the planet or maybe just help people get better when they are ill? Or maybe you don’t care about any of this and just want to earn lots of money?

Well it doesn’t really matter. Whatever you do the knowledge and skills you gain by studying physics will be useful. Physics is more than a subject – it trains your brain to think beyond boundaries.

“There are millions of students in the world, but to get a job you have to stand out from the crowd. Physics will help to give you that edge; people are always impressed by a qualification in physics.”

source : http://www.physics.org/article-study.asp?contentid=468&hsub=1&pid=391&test=5

STRING THEORY

Tim Whitwell is a research engineer who works in Hong Kong. He uses his physics knowledge to tackle acoustics, electromagnetic design and mechanics. He was a resident expert on Big Bang Blogs for a month, and school pupils had the chance to ask him some questions about his life, the universe and everything.

What is string theory?

One of the goals of Physics is to find a single theory that unites all of the four forces of nature. These are; electromagnetism, gravity, and the strong and weak nuclear forces. The first two are familiar. Electromagnetism is the force that holds a fridge magnet to a refrigerator while gravity is trying to pull it off towards the earth.

The strong nuclear force is responsible for holding the central part of atoms (their nuclei) together, while the weak nuclear force is involved in the decay of these nuclei.

In the attempt to tie all the four forces together a lot of interesting ideas and new theories have been proposed. One of the most promising of these new theories is string theory. In attempting to unite gravity with the three other forces, string theory requires us to change the way we view the universe.

According to the theory all particles are actually tiny vibrating strings and each type of vibration corresponds to a different particle. The different particles are like the different notes that can be played by bowing a violin string. However, the strings of string theory almost certainly would not look like violin strings.

String theory also requires us to accept the existence of extra dimensions in the universe. We are familiar with the four usual dimensions: up-down, forwards-backwards, left-right and time, but string theory requires seven more dimensions!
A universe of eleven dimensions seems strange to us but many physicists think these extra dimensions are possible and are looking for ways to detect them.

The attempt to unify the 4 forces of nature is one of the most exciting areas of physics and I hope to be around if this is successful, whether it is string theory or some other candidate that is successful. On the other hand there is the possibility that no single, theory exists that can describe all the forces of nature in a neat and tidy way as we would like.

Whatever the outcome, scientists from all over the world will continue working together to discover what could be the ultimate theory of everything

source : http://www.physics.org/article-questions.asp?id=47

What is Physics?

The dictionary definition of physics is “the study of matter, energy, and the interaction between them”, but what that really means is that physics is about asking fundamental questions and trying to answer them by observing and experimenting.

Physicists ask really big questions like:

  • How did the universe begin?
  • How will the universe change in the future?
  • How does the Sun keep on shining?
  • What are the basic building blocks of matter?

If you think these questions are fascinating, then you’ll like physics.

What do Physicists do?

Many physicists work in ‘pure’ research, trying to find answers to these types of question. The answers they come up with often lead to unexpected technological applications. For example, all of the technology we take for granted today, including games consoles, mobile phones, mp3 players, and DVDs, is based on a theoretical understanding of electrons that was developed around the turn of the 20th century.
Physics doesn’t just deal with theoretical concepts. It’s applied in every sphere of human activity, including:

  • Development of sustainable forms of energy production
  • Treating cancer, through radiotherapy, and diagnosing illness through various types of imaging, all based on physics.
  • Developing computer games
  • Design and manufacture of sports equipment
  • Understanding and predicting earthquakes

…in fact, pretty much every sector you can think of needs people with physics knowledge.

What about mathematics?

Many apparently complicated things in nature can be understood in terms of relatively simple mathematical relationships. Physicists try to uncover these relationships through observing, creating mathematical models, and testing them by doing experiments. The mathematical equations used in physics often look far more complicated than they really are. Nevertheless, if you are going to study physics, you will need to get to grips with a certain amount of maths.

…and computers?

Physicists are increasingly using advanced computers and programming languages in the solution of scientific problems, particularly for modelling complex processes. If the simulation is not based on correct physics, then it has no chance of predicting what really happens in nature. Most degree courses in physics now involve at least some computer programming

source : http://www.physics.org/article-questions.asp?id=18

Menjadi Mahasiswa Fisika di Umur 11 Tahun

Usianya baru 11 tahun, tetapi Carson Huey You  sudah menjadi mahasiswa di Texas Christian University di fort Worth, Texas. Pada usia sepuluh tahun, Carson melamar kuliah dan diterima sebagai mahasiswa jurusan Fisika.

Pihak Texas Christian University menyatakan, Carson adalah mahasiswa termuda sepanjang sejarah kampus itu. Bagi Carson, status ini bukan masalah. Sebab, kata Carson, dia sangat lah menyukai sekolah dan terutama memecahkan masalah. Carson juga memiliki alasan khusus dalam memilih Fisika sebagai jurusannya.

“Saya suka angka. Selain itu, membuat soal secara acak dan menyelesaikannya membantu saya lebih tenang ketika sedang marah atau butuh rileks,” kata Carson, seperti dikutip dari Yahoo News, Jumat (30/8/2013).

Meski sudah mahasiswa, sang ibu, Claretta Huey-You, mendampingi Carson ke kampus. Tetapi, dia tidak pernah masuk kelas ketika Carson belajar.

Claretta menyekolahkan Carson di rumah (home schooling) hingga Carson berusia lima tahun. Ketika Carson berumur dua tahun, dia sudah bisa menjumlahkan, mengurangi, mengalikan dan membagi angka-angka. Ketika itulah Claretta tahu bahwa Carson menunjukkan perkembangan yang pesat dalam pendidikan.

“Pada usia lima tahun, dia dapat mengerjakan aljabar. Ini adalah tantangan yang datang begitu cepat. Setelah lima tahun home schooling, saya menyekolahkan Carson ke sekolah swasta yang langsung menempatkannya di kelas delapan,” ujar Claretta.

Di kampus, Carson didampingi oleh Dr. Magnus Rittby. Sang doktor adalah wakil dekan dan profesor dalam bidang fisika dan astronomi.

“Ketika orang-orang khawatir tentang Carson berkuliah di usia sangat muda, reaksi saya adalah, ‘Apa lagi yang akan dia lakukan?’ Saya pikir, para mahasiswa akan belajar dari dia. Jika anak 11 tahun bisa berdiri di depan kelas dan menyatakan pemikirannya, mungkin itu akan mendorong mahasiswa lainnya untuk melakukan hal yang sama,” kata Rittby.

Menurut Carson, teman-temannya sangat baik dan membantu. Berada di kampus, dalam istilah Carson, amat lah “menyenangkan”.

“Hanya berada di kampus, mempelajari materi baru, menyelesaikan masalah; semua dalam area itu sangat asyik,” imbuh penyuka Star Wars ini.

Claretta, sang ibu, menyatakan Carson akan menyelesaikan studinya sesuai standar, yakni empat tahun. Claretta pun tidak ingin menyuruh Carson terburu-buru karena dia masih memiliki banyak waktu.

“Saya hanya ingin menjadikan ini sebagai pengalaman terbaik dalam hidupnya. Tetapi, saya juga tidak dapat menahan atau menghentikannya,” tutur Claretta.

Cita-cita Carson, menurut Claretta, adalah meraih gelar doktor dan melakukan penelitian “untuk menemukan sesuatu yang sangat besar dan brdampak pada cara kita hidup serta lebih baik bagi planet kita.”

Claretta menyadari, bakat anaknya adalah sebuah tanggung jawab yang amat besar. Tetapi, meski anaknya dianugerahi otak yang cemerlang, Claretta hanya ingin menyampaikan bahwa dia sangat bangga pada anaknya.

“Selain pintar, dia sangat rendah hati, baik dan penyayang. Meski sekarang dia di kampus, saya hanya ingin orang-orang tahu bahwa Carson adalah anak yang baik dan saudara yang hebat juga,” ujar Claretta. (ade)

sumber : http://www.fisikanet.lipi.go.id/utama.cgi?artikel&1377988137&1

Kumpulan Soal UN Fisika

Hey, jika kamu adalah salah satu peserta Ujian Nasional (UN) yang ingin menguji kemampuanmu, coba deh kerjakan soal-soal yang ada di Kumpulan Soal UN Fisika. Untuk kalian yang bukan peserta UN, boleh juga mengerjakannya. Hitung-hitung, mengisi waktu luang. Hehehe

Seminar dan Workshop Nasional Olimpiade Fisika

HIMAFI STKIP Surya akan mengadakan Seminar dan Workshop Nasional Olimpiade Fisika STKIP Surya 2013 pada tanggal 3 November 2013 di Gedung SuRE, Tangerang.

Kegiatan ini bertujuan untuk menambah wawasan peserta mengenai Olimpiade Fisika. Dalam kegiatan ini kami berbagi mengenai penemuan-penemuan baru di bidang fisika dan bagaimana cara mempersiapkan tim olimpiade Fisika serta cara-cara mudah untuk mengerjakan soal-soal olimpiade.
Kami mengundang guru dan mahasiswa dari seluruh Indonesia untuk datang dan bergabung dalam acara ini, peserta yang datang dari seluruh Indonesia ini diharapkan akan menjadi penyebar-penyebar ilmu-ilmu yang didapatnya sehingga mampu meratakan penyebaran tim-tim olimpiade Fisika dari seluruh wilayah di Indonesia.

Kegiatan ini akan diisi oleh:
Prof. Yohanes Surya, Ph.D (Presiden STKIP Surya)
Hendra Johnny Kwee, Ph.D (Ketua TOFI)
Herry Johnny Kwee, Ph.D (Pembina Teori TOFI)
Zainul Abidin, Ph.D (Peraih medali perak pada APhO ke-1 tahun 2000)
Alexander Rodo Jusakman Silalahi, Ph.D (Pembina Eksperimen TOFI)
Jong Anly Tan, Ph.D (Pembina Eksperimen TOFI)

Peserta terbatas, kami hanya akan menerima 200 orang peserta. 150 orang guru SMA dan 50 mahasiswa dari seluruh Indonesia.
So buruan daftar, kapan lagi dapet ilmu langsung dari sumbernya?

SI PAHIT SAMBILOTO

Ada yang belum tahu dengan Sambiloto? Wah, kebetulan sekali. Kali ini ada ulasan sedikit tentang tumbuhan yang yang identik dengan rasa pahit tersebut.

Sambiloto merupakan tumbuhan berkhasiat obat berupa terna tegak yang tingginya bisa mencapai 90 sentimeter. Asalnya diduga dari Asia tropika. Penyebarannya dari India meluas ke selatan sampai di Siam, ke timur sampai semenanjung Malaya, kemudian ditemukan Jawa. Tumbuh baik di dataran rendah sampai ketinggian 700 meter dari permukaan laut. Sambiloto dapat tumbuh baik pada curah hujan 2000-3000 mm/tahun dan suhu udara 25-32 derajat Celcius. Kelembaban yang dibutuhkan termasuk sedang, yaitu 70-90% dengan penyinaran agak lama. Nama daerah untuk sambiloto antara lain: sambilata (Melayu); ampadu tanah (Sumatera Barat); sambiloto, ki pait, bidara, andiloto (Jawa Tengah); ki oray (Sunda); pepaitan (Madura), sedangkan nama asingnya Chuan xin lien (Cina).

Tanaman sambiloto digunakan untuk mencegah pembentukan radang, memperlancar air seni (diuretika), menurunkan panas badan (antipiretika), obat sakit perut, kencing manis, dan terkena racun. kandungan senyawa kalium memberikan khasiat menurunkan tekanan darah. Hasil percobaan farmakologi menunjukkan bahwa air rebusan daun sambiloto 10% dengan takaran 0.3 ml/kg berat badan dapat memberikan penurunan kadar gula darah yang sebanding dengan pemberian suspensi glibenclamid. Selain itu, daun Sambiloto juga dipercaya bisa digunakan sebagai obat penyakit tifus dengan cara mengambil 10-15 daun yang direbus sampai mendidih dan diminum air rebusannya.

sumber : id.wikiedia.org

Tips Meminum Rebusan Daun Sambiloto:

  • Ucapkan basmalah sebelum meminum dan persiapkan mental kalian sebaik-baiknya untuk menrima sensasi rasa pada lidah
  • Teguklah air rebusan tersebut dengan cepat. Jangan terlalu menikmati. Terlalu menikmati dapat menyebabkan mulut kalian terbuka lebar dan menjulurkan lidah
  • Meminum rebusan itu sebaiknya dilakukan sebelum makan agar rasa pahitnya segera hilang dari lidah
  • Jika kalian meminumnya setelah makan, segeralah minum air putih dan berkumur-kumur untuk menghilangkan rasa yang masih tertinggal
  • Ucapkan hamdalah